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2008-02-05iommu sg merging: alpha: make pci_iommu respect the segment size limitsFUJITA Tomonori2-6/+19
This patch makes pci_iommu respect segment size limits when merging sg lists. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg merging: IA64: make sba_iommu respect the segment size limitsFUJITA Tomonori1-2/+6
This patch makes sba iommu respect segment size limits when merging sg lists. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg merging: ppc: make iommu respect the segment size limitsFUJITA Tomonori3-4/+8
This patch makes iommu respect segment size limits when merging sg lists. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg merging: x86: make pci-gart iommu respect the segment size limitsFUJITA Tomonori1-0/+7
This patch makes pci-gart iommu respect segment size limits when merging sg lists. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: Dave Airlie <airlied@linux.ie> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg merging: PCI: add device_dma_parameters supportFUJITA Tomonori3-0/+20
This adds struct device_dma_parameters in struct pci_dev and properly sets up a pointer in struct device. The default max_segment_size is set to 64K, same to the block layer's default value. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Mostly-acked-by: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05iommu sg merging: add device_dma_parameters structureFUJITA Tomonori2-0/+26
IOMMUs merges scatter/gather segments without considering a low level driver's restrictions. The problem is that IOMMUs can't access to the limitations because they are in request_queue. This patchset introduces a new structure, device_dma_parameters, including dma information. A pointer to device_dma_parameters is added to struct device. The bus specific structures (like pci_dev) includes device_dma_parameters. Low level drivers can use dma_set_max_seg_size to tell IOMMUs about the restrictions. We can move more dma stuff in struct device (like dma_mask) to struct device_dma_parameters later (needs some cleanups before that). This includes patches for all the IOMMUs that could merge sg (x86_64, ppc, IA64, alpha, sparc64, and parisc) though only the ppc patch was tested. The patches for other IOMMUs are only compile tested. This patch: Add a new structure, device_dma_parameters, including dma information. A pointer to device_dma_parameters is added to struct device. - there are only max_segment_size and segment_boundary_mask there but we'll move more dma stuff in struct device (like dma_mask) to struct device_dma_parameters later. segment_boundary_mask is not supported yet. - new accessors for the dma parameters are added. So we can easily change where to place struct device_dma_parameters in the future. - dma_get_max_seg_size returns 64K if dma_parms in struct device isn't set up properly. 64K is the default max_segment_size in the block layer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: MPSC: set baudrate when BRG divider is set.Mark A. Greer1-0/+1
The clock to generate the desired baudrate with the MPSC is first divided by the Baud Rate Generator (BRG) and then by the MPSC itself. So, when the BRG divider is changed, the MPSC divider must also be changed to generate the correct baudrate. During MPSC initialization, the BRG divider is changed but the MPSC divider isn't changed until much later. This results in some printk's coming out garbled. To fix that, set the MPSC divider at the same time that the BRG divider is changed. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: Coding styleAlan Cox2-5/+7
Coding style tweaks and printk levels. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: speed setup failure reportingAlan Cox1-2/+3
Invalid speeds are forced to 9600. Update the code for this to encode new style baud rates properly. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: avoid stalling suspend if serial port won't drainRussell King1-1/+7
Some ports seem to be unable to drain their transmitters on shut down. Such a problem can occur if the port is programmed for hardware imposed flow control, characters are in the FIFO but the CTS signal is inactive. Normally, this isn't a problem because most places where we wait for the transmitter to drain have a time-out. However, there is no timeout in the suspend path. Give a port 30ms to drain; this is an arbitary value chosen to avoid long delays if there are many such ports in the system, while giving a reasonable chance for a single port to drain. Should a port not drain within this timeout, issue a warning. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: avoid waking up closed serial ports on resumeRussell King1-2/+2
When we boot, serial ports remain in low power mode until they're used either by userspace or for the kernel console. However, if you suspend the system, and then resume, all serial ports will be taken out of low power mode. This is bad news for embedded devices where this can mean higher power consumption. Only bring a serial port out of low power mode if the port is being used as the kernel console, or is in use by userspace. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-058250.c: support specifying DW APB UARTs in device platform_dataWill Newton2-19/+22
Allow the private_data field to be specified in platform_data for the standard 8250/16550 UART. This field is used by DW APB type UARTs and without this patch it's only possible to set this field when registering the port by hand. If private_data is not set then the driver will potentially oops with a NULL pointer dereference. Signed-off-by: Will Newton <will.newton@gmail.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: add ADDI-DATA GmbH Communication cardsin8250_pci.c and pci_ids.hKrauth.Julien2-0/+150
Add ADDI-DATA GmbH communication cards to 8250_pci driver. Supported cards are: APCI-7300, APCI-7420, APCI-7500, APCI-7800 APCI-7300-2, APCI-7420-2, APCI-7500-2 APCI-7300-3, APCI-7420-3, APCI-7500-3, APCI-7800-3 [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Krauth J. <krauth.julien@addi-data.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05drivers/serial/s3c2410.c: remove dead config symbolsJiri Olsa1-1/+1
Remove dead config symbol. Signed-off-by: Jiri Olsa <olsajiri@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ben Dooks <ben@fluff.org> Cc: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05serial: keep the DTR setting for serial console.Yinghai Lu1-1/+2
with reverting "x86, serial: convert legacy COM ports to platform devices", we will have the serial console before the port is probled again. uart_add_one_port==>uart_configure_port==>set_mcttrl(port, 0) will clear the DTR setting by uart_set_options(). then I will lose my output from serial console again. So try to keep DTR in uart_configure_port() Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Andi Kleen <ak@suse.de> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05drivers/pcmcia: add missing pci_dev_getJulia Lawall1-1/+3
pci_get_slot does a pci_dev_get, so pci_dev_put needs to be called in an error case. An extract of the semantic match used to find the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type find1.T,T1,T2; identifier find1.E; statement find1.S; expression x1,x2,x3; expression find1.test; int ret != 0; @@ T E; ... ( * E = pci_get_slot(...); if (E == NULL) S | * if ((E = pci_get_slot(...)) == NULL) S ) ... when != pci_dev_put(...,(T1)E,...) when != if (E != NULL) { ... pci_dev_put(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (test) { ... when != pci_dev_put(...,(T2)E,...) when != if (E != NULL) { ... pci_dev_put(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05drivers/pcmcia: Add missing iounmapJulia Lawall1-1/+5
of_iomap calls ioremap, and so should be matched with an iounmap. At the two error returns, the result of calling of_iomap is only stored in a local variable, so these error paths need to call iounmap. Furthermore, this function ultimately stores the result of of_iomap in an array that is local to the file. These values should be iounmapped at some point. I have added a corresponding call to iounmap at the end of the function m8xx_remove. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T,T1,T2; identifier E; statement S; expression x1,x2,x3; int ret; @@ T E; ... * E = of_iomap(...); if (E == NULL) S ... when != iounmap(...,(T1)E,...) when != if (E != NULL) { ... iounmap(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (...) { ... when != iounmap(...,(T2)E,...) when != if (E != NULL) { ... iounmap(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Vitaly Bordug <vitb@kernel.crashing.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05at91_cf: use generic gpio callsDavid Brownell1-15/+47
Update the AT91 CF driver to use the generic GPIO calls instead of the AT91-specific ones; and request exclusive use of those signals. Minor tweaks to cleanup code paths: always in reverse order of how the resources were allocated, with remove() matching the fault paths of probe(). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia/pcnet_cs: fix 'shadow variable' warningRichard Knutsson1-13/+13
Fixing: CHECK drivers/net/pcmcia/pcnet_cs.c drivers/net/pcmcia/pcnet_cs.c:523:15: warning: symbol 'hw_info' shadows an earlier one drivers/net/pcmcia/pcnet_cs.c:148:18: originally declared here Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia/fmvj18x_cs: fix 'shadow variable' warningRichard Knutsson1-2/+1
Fixing: CHECK drivers/net/pcmcia/fmvj18x_cs.c drivers/net/pcmcia/fmvj18x_cs.c:1205:6: warning: symbol 'i' shadows an earlier one drivers/net/pcmcia/fmvj18x_cs.c:1179:9: originally declared here Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia/axnet_cs: make use of 'max()' instead of handcrafted oneRichard Knutsson1-2/+2
Use 'max(x,y)' instead of 'x < y ? y : x'. Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia/axnet_cs: make functions staticRichard Knutsson1-2/+2
Fixing: CHECK drivers/net/pcmcia/axnet_cs.c drivers/net/pcmcia/axnet_cs.c:994:5: warning: symbol 'ax_close' was not declared. Should it be static? drivers/net/pcmcia/axnet_cs.c:1017:6: warning: symbol 'ei_tx_timeout' was not declared. Should it be static? Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia/3c574_cs: fix 'shadow variable' warningRichard Knutsson1-1/+1
Fixing: CHECK drivers/net/pcmcia/3c574_cs.c drivers/net/pcmcia/3c574_cs.c:695:7: warning: symbol 'i' shadows an earlier one drivers/net/pcmcia/3c574_cs.c:636:6: originally declared here Signed-off-by: Richard Knutson <ricknu-0@student.ltu.se> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia: include bad CIS filename in error messageRandy Dunlap1-2/+3
- Print the invalid CIS filename in the invalid filename message. - Use sizeof() instead of hard-coded constant for buffer size. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia: stop updating dev->power.power_stateDavid Brownell1-4/+6
This stops the pcmcia core from using dev->power.power_state; that field is deprecated (overdue for removal) and the only reason to update it was to make the /sys/devices/.../power/state files (now removed) work better. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia: replace kio_addr_t with unsigned int everywhereOlof Johansson22-222/+228
Remove kio_addr_t, and replace it with unsigned int. No known architecture needs more than 32 bits for IO addresses and ports and having a separate type for it is just messy. Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <matthew@wil.cx> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05pcmcia: convert some internal-only ioaddr_t to unsigned intOlof Johansson4-20/+21
Convert the io_req_t members to unsigned int, to allow use on machines with more than 16 bits worth of IO ports (i.e. secondary busses on ppc64, etc). There was only a couple of places in drivers where a change was needed. I left printk formats alone (there are lots of %04x-style formats in there), mostly to not change the format on the platforms that only have 16-bit io addresses, but also because the padding doesn't really add all that much value most of the time. I found only one sprintf of an address, and upsized the string accordingly (I doubt anyone will have anywhere near INT_MAX as irq value, but at least there's room for it now). Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <matthew@wil.cx> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05m32r: remove dead config symbols from M32R codeJiri Olsa3-6/+4
remove dead config symbols from M32R code Signed-off-by: Jiri Olsa <olsajiri@gmail.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05include/asm-powerpc/nvram.h needs list.hAndrew Morton1-0/+3
CC [M] sound/ppc/awacs.o In file included from sound/ppc/awacs.c:24: include/asm/nvram.h:62: error: field 'partition' has incomplete type Reported-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05sdio: fix module device table definition for m68kAl Viro1-1/+2
FATAL: drivers/bluetooth/btsdio: sizeof(struct sdio_device_id)=12 is not a modulo of the size of section __mod_sdio_device_table=30. Fix definition of struct sdio_device_id in mod_devicetable.h m68k has 16bit alignment for unsigned long. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Pierre Ossman <drzeus@drzeus.cx> CC: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05timerfd: un-break CONFIG_TIMERFDDavide Libenzi1-1/+0
Remove the broken status to CONFIG_TIMERFD. Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05timerfd: wire the new timerfd API to the x86 familyDavide Libenzi4-5/+16
Wires up the new timerfd API to the x86 family. Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05timerfd: new timerfd APIDavide Libenzi24-118/+210
This is the new timerfd API as it is implemented by the following patch: int timerfd_create(int clockid, int flags); int timerfd_settime(int ufd, int flags, const struct itimerspec *utmr, struct itimerspec *otmr); int timerfd_gettime(int ufd, struct itimerspec *otmr); The timerfd_create() API creates an un-programmed timerfd fd. The "clockid" parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME. The timerfd_settime() API give new settings by the timerfd fd, by optionally retrieving the previous expiration time (in case the "otmr" parameter is not NULL). The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit is set in the "flags" parameter. Otherwise it's a relative time. The timerfd_gettime() API returns the next expiration time of the timer, or {0, 0} if the timerfd has not been set yet. Like the previous timerfd API implementation, read(2) and poll(2) are supported (with the same interface). Here's a simple test program I used to exercise the new timerfd APIs: http://www.xmailserver.org/timerfd-test2.c [akpm@linux-foundation.org: coding-style cleanups] [akpm@linux-foundation.org: fix ia64 build] [akpm@linux-foundation.org: fix m68k build] [akpm@linux-foundation.org: fix mips build] [akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds] [heiko.carstens@de.ibm.com: fix s390] [akpm@linux-foundation.org: fix powerpc build] [akpm@linux-foundation.org: fix sparc64 more] Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05timerfd: introduce a new hrtimer_forward_now() functionDavide Libenzi1-0/+7
I think that advancing the timer against the timer's current "now" can be a pretty common usage, so, w/out exposing hrtimer's internals, we add a new hrtimer_forward_now() function. Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05exec: rework the group exit and fix the race with killOleg Nesterov4-12/+15
As Roland pointed out, we have the very old problem with exec. de_thread() sets SIGNAL_GROUP_EXIT, kills other threads, changes ->group_leader and then clears signal->flags. All signals (even fatal ones) sent in this window (which is not too small) will be lost. With this patch exec doesn't abuse SIGNAL_GROUP_EXIT. signal_group_exit(), the new helper, should be used to detect exit_group() or exec() in progress. It can have more users, but this patch does only strictly necessary changes. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robin Holt <holt@sgi.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05remove handle_group_stop() in favor of do_signal_stop()Oleg Nesterov1-38/+5
Every time we set SIGNAL_GROUP_EXIT or clear SIGNAL_STOP_DEQUEUED we also reset ->group_stop_count. This means that the SIGNAL_GROUP_EXIT check in handle_group_stop() is not needed, and do_signal_stop() should check SIGNAL_STOP_DEQUEUED only when ->group_stop_count == 0. With these changes handle_group_stop() becomes the subset of do_signal_stop(), we can kill it and use do_signal_stop() instead. Also, a preparation for the next patch. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robin Holt <holt@sgi.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05__group_complete_signal(): fix coredump with group stop raceOleg Nesterov1-30/+0
When __group_complete_signal() sees sig_kernel_coredump() signal, it starts the group stop, but sets ->group_exit_task = t in a hope that "t" will actually dequeue this signal and invoke do_coredump(). However, by the time "t" enters get_signal_to_deliver() it is possible that the signal was blocked/ignored or we have another pending !SIG_KERNEL_COREDUMP_MASK signal which will be dequeued first. This means the task could be stopped but not killed. Remove this code from __group_complete_signal(). Note also this patch removes the bogus signal_wake_up(t, 1). This thread can't be STOPPED/TRACED, note the corresponding check in wants_signal(). Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robin Holt <holt@sgi.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05clone: prepare to recycle CLONE_STOPPEDAndrew Morton1-0/+17
Ulrich says that we never used this clone flags and that nothing should be using it. As we're down to only a single bit left in clone's flags argument, let's add a warning to check that no userspace is actually using it. Hopefully we will be able to recycle it. Roland said: CLONE_STOPPED was previously used by some NTPL versions when under thread_db (i.e. only when being actively debugged by gdb), but not for a long time now, and it never worked reliably when it was used. Removing it seems fine to me. [akpm@linux-foundation.org: it looks like CLONE_DETACHED is being used] Cc: Ulrich Drepper <drepper@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05get_task_comm(): return the resultAndrew Morton2-2/+3
It was dumb to make get_task_comm() return void. Change it to return a pointer to the resulting output for caller convenience. Cc: Ulrich Drepper <drepper@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05lockdep: annotate epollPeter Zijlstra2-1/+17
On Sat, 2008-01-05 at 13:35 -0800, Davide Libenzi wrote: > I remember I talked with Arjan about this time ago. Basically, since 1) > you can drop an epoll fd inside another epoll fd 2) callback-based wakeups > are used, you can see a wake_up() from inside another wake_up(), but they > will never refer to the same lock instance. > Think about: > > dfd = socket(...); > efd1 = epoll_create(); > efd2 = epoll_create(); > epoll_ctl(efd1, EPOLL_CTL_ADD, dfd, ...); > epoll_ctl(efd2, EPOLL_CTL_ADD, efd1, ...); > > When a packet arrives to the device underneath "dfd", the net code will > issue a wake_up() on its poll wake list. Epoll (efd1) has installed a > callback wakeup entry on that queue, and the wake_up() performed by the > "dfd" net code will end up in ep_poll_callback(). At this point epoll > (efd1) notices that it may have some event ready, so it needs to wake up > the waiters on its poll wait list (efd2). So it calls ep_poll_safewake() > that ends up in another wake_up(), after having checked about the > recursion constraints. That are, no more than EP_MAX_POLLWAKE_NESTS, to > avoid stack blasting. Never hit the same queue, to avoid loops like: > > epoll_ctl(efd2, EPOLL_CTL_ADD, efd1, ...); > epoll_ctl(efd3, EPOLL_CTL_ADD, efd2, ...); > epoll_ctl(efd4, EPOLL_CTL_ADD, efd3, ...); > epoll_ctl(efd1, EPOLL_CTL_ADD, efd4, ...); > > The code "if (tncur->wq == wq || ..." prevents re-entering the same > queue/lock. Since the epoll code is very careful to not nest same instance locks allow the recursion. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Tested-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Davide Libenzi <davidel@xmailserver.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05drivers/net/wireless/b43/main.c needs io.hAndrew Morton1-0/+1
m68k: drivers/net/wireless/b43/main.c:251: error: implicit declaration of function 'mmiowb' Cc: "John W. Linville" <linville@tuxdriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05sys_remap_file_pages: fix ->vm_file accountingOleg Nesterov1-1/+4
Fix ->vm_file accounting, mmap_region() may do do_munmap(). Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05kvm: i386 fixAndrew Morton1-4/+4
arch/x86/kvm/x86.c: In function 'emulator_cmpxchg_emulated': arch/x86/kvm/x86.c:1746: warning: passing argument 2 of 'vcpu->arch.mmu.gva_to_gpa' makes integer from pointer without a cast arch/x86/kvm/x86.c:1746: warning: 'addr' is used uninitialized in this function Is true. Local variable `addr' shadows incoming arg `addr'. Avi is on vacation for a while, so... Cc: Avi Kivity <avi@qumranet.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-04Explain kmem_cache_cpu fieldsChristoph Lameter1-5/+5
Add some comments explaining the fields of the kmem_cache_cpu structure. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-02-04SLUB: Do not upset lockdeproot1-0/+8
inconsistent {softirq-on-W} -> {in-softirq-W} usage. swapper/0 [HC0[0]:SC1[1]:HE0:SE0] takes: (&n->list_lock){-+..}, at: [<ffffffff802935c1>] add_partial+0x31/0xa0 {softirq-on-W} state was registered at: [<ffffffff80259fb8>] __lock_acquire+0x3e8/0x1140 [<ffffffff80259838>] debug_check_no_locks_freed+0x188/0x1a0 [<ffffffff8025ad65>] lock_acquire+0x55/0x70 [<ffffffff802935c1>] add_partial+0x31/0xa0 [<ffffffff805c76de>] _spin_lock+0x1e/0x30 [<ffffffff802935c1>] add_partial+0x31/0xa0 [<ffffffff80296f9c>] kmem_cache_open+0x1cc/0x330 [<ffffffff805c7984>] _spin_unlock_irq+0x24/0x30 [<ffffffff802974f4>] create_kmalloc_cache+0x64/0xf0 [<ffffffff80295640>] init_alloc_cpu_cpu+0x70/0x90 [<ffffffff8080ada5>] kmem_cache_init+0x65/0x1d0 [<ffffffff807f1b4e>] start_kernel+0x23e/0x350 [<ffffffff807f112d>] _sinittext+0x12d/0x140 [<ffffffffffffffff>] 0xffffffffffffffff This change isn't really necessary for correctness, but it prevents lockdep from getting upset and then disabling itself. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Christoph Lameter <clameter@sgi.com> Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-04SLUB: Fix coding style violationsPekka Enberg1-23/+23
This fixes most of the obvious coding style violations in mm/slub.c as reported by checkpatch. Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-04Add parameter to add_partial to avoid having two functionsChristoph Lameter1-16/+15
Add a parameter to add_partial instead of having separate functions. The parameter allows a more detailed control of where the slab pages is placed in the partial queues. If we put slabs back to the front then they are likely immediately used for allocations. If they are put at the end then we can maximize the time that the partial slabs spent without being subject to allocations. When deactivating slab we can put the slabs that had remote objects freed (we can see that because objects were put on the freelist that requires locks) to them at the end of the list so that the cachelines of remote processors can cool down. Slabs that had objects from the local cpu freed to them (objects exist in the lockless freelist) are put in the front of the list to be reused ASAP in order to exploit the cache hot state of the local cpu. Patch seems to slightly improve tbench speed (1-2%). Signed-off-by: Christoph Lameter <clameter@sgi.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-02-04SLUB: rename defrag to remote_node_defrag_ratioChristoph Lameter2-9/+13
The NUMA defrag works by allocating objects from partial slabs on remote nodes. Rename it to remote_node_defrag_ratio to be clear about this. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-02-04Move count_partial before kmem_cache_shrinkChristoph Lameter1-13/+13
Move the counting function for objects in partial slabs so that it is placed before kmem_cache_shrink. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-02-04SLUB: Fix sysfs refcountingChristoph Lameter1-2/+13
If CONFIG_SYSFS is set then free the kmem_cache structure when sysfs tells us its okay. Otherwise there is the danger (as pointed out by Al Viro) that sysfs thinks the kobject still exists after kmem_cache_destroy() removed it. Signed-off-by: Christoph Lameter <clameter@sgi.com> Reviewed-by: Pekka J Enberg <penberg@cs.helsinki.fi>
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