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2009-12-12kbuild: move compile.h to include/generatedSam Ravnborg4-9/+4
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: drop include/asmSam Ravnborg2-39/+2
We no longer use this directory for generated files and all architectures has moved their header files so no symlink tricks are needed either. Drop the symlink and drop the ARCH check. If we really need to check that the SRCARCH has not changed when we build a kernel we can add this check back - but then we will find a more convenient way to store the info. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: do not check for include/asm-$ARCHSam Ravnborg2-10/+3
No architectures uses include/asm-$ARCH now. So drop check for location of include files Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: drop include2/ used for O=... buildsSam Ravnborg2-11/+4
There is no longer any use of the include2/ directory. The generated files has moved to include/generated. Drop all references to said directory. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12sh: move machtypes.h to include/generatedSam Ravnborg6-13/+8
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12arm: move mach-types to include/generatedSam Ravnborg4-14/+5
Simplified arch/arm/Makefile by dropping the maketools target It was undocumented and not needed Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12ia64: move nr-irqs.h to include/generatedSam Ravnborg3-7/+4
Avoid generating files in the now deprecated asm-ia64 dir Simplified the logic in the Makefile when editing stuff in the area Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: move asm-offsets.h to include/generatedSam Ravnborg24-4/+22
The simplest method was to add an extra asm-offsets.h file in arch/$ARCH/include/asm that references the generated file. We can now migrate the architectures one-by-one to reference the generated file direct - and when done we can delete the temporary arch/$ARCH/include/asm/asm-offsets.h file. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: move bounds.h to include/generatedSam Ravnborg6-6/+5
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12dontdiff: add generatedSam Ravnborg1-0/+1
We move more and more stuff to include/generated - so lets ignore the content for users of plain diff. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: search arch/$ARCH/include before include/Sam Ravnborg1-2/+1
The namespace used in arch/$ARCH/include is different from what is used in include/ except for the include/asm directory. This patch gives the arch/$ARCH/include/asm directory priority over include/asm. When we add asm-offsets.h to arch/$ARCH/include/asm/ this patch makes sure we pick up the arch specific version and not the one we have in include/asm. The situation with an asm-offsets.h file located in both include/asm _and_ arch/$ARCH/include/asm will happen when we move more files over to include/generated. This happens because in some cases it is not practical to rename all users so we simply add a file in arch/$ARCH/include/asm that includes the generated version. This is the solution we use for asm-offsets.h as an example. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12kbuild: fix bzImage build for x86Michael Tokarev1-1/+1
As has been discussed previously (and Sam has been CC'ed), the fix is still incorrect. It replaces "echo -ne" with "/bin/echo -ne", but neither of the two are guaranteed to support the necessary arguments and necessary (hexadecimal) escape sequences. What should be used here is printf(1). The trivial patch below (on top of these kbuild changes) fixes this issue. Signed-Off-By: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-11Staging: batman: fix debug Kconfig optionGreg Kroah-Hartman1-1/+1
The debug batman option needs to depend on the correct config option. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> [ "No means no!" - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-11tty: split the lock up a bit furtherAlan Cox1-0/+3
The tty count sanity check may need the BKL, that isn't clear. However it is clear that the count use of the lock is internal and independant of the bigger use of the lock. Furthermore the file list locking is also separately locked already Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: Move the leader test in disassociateAlan Cox2-3/+4
There are two call points, both want to check that tty->signal->leader is set. Move the test into disassociate_ctty() as that will make locking changes easier in a bit Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: Push the bkl down a bit in the hangup codeAlan Cox1-2/+2
We know that the redirect field is handled via its own locking in all places Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: Push the lock down further into the ldisc codeAlan Cox2-5/+9
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: push the BKL down into the handlers a bitAlan Cox4-63/+95
Start trying to untangle the remaining BKL mess Updated to fix missing unlock_kernel noted by Dan Carpenter Signed-off-by: Alan "I must be out of my tree" Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: split open lockAlan Cox1-12/+11
moxa_openlock is used for several situations where we want to handle the case of an ioctl that crosses many ports (not just the open tty), and also cases where an open races a deinit (eg a pci unplug) and we hangup a port before we can cope with that. The non open race cases can use the moxa_lock spinlock. This simplifies sorting out the remaining mess. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: Kill the use of lock_kernelAlan Cox1-14/+2
It isn't needed here any more Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: Fix modem op lockingAlan Cox1-15/+10
This is overkill and mostly not needed Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: Kill off the throttle methodAlan Cox1-20/+1
The tty flag can be tested so the shadow flag isn't needed Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: Locking clean upAlan Cox1-33/+25
- The open lock is needed to fix up the case of a board reset occuring during tty open but too early for a sane hangup response. - The lock can however got for other cases - Use the port mutex for get/setserial - Fix up the confused lack of locking on the THROTTLE and other bits in the private flags. Just use set/test/clear bit and it covers the cases we need Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: rework the locking a bitAlan Cox1-5/+22
Introduce a lock for moxafunc() to protect the cases where were get collisions between two function requests at the same time. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: moxa: Use more tty_port opsAlan Cox1-116/+21
Rework a few bits of this into tty_port format Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: isicom: fix deadlock on shutdownAlan Cox1-1/+1
Alexander Strakh <strakh@ispras.ru> reported KERNEL_VERSION: 2.6.31 DESCRIBE: Driver drivers/char/isicom.c might sleep in atomic context, because it calls tty_port_xmit_buf under spin_lock. ./drivers/char/isicom.c: 1307 static void isicom_hangup(struct tty_struct *tty) 1308 { ... 1315 spin_lock_irqsave(&port->card->card_lock, flags); 1316 isicom_shutdown_port(port); ... Path to might_sleep macro from isicom_hangup: 1. isicom_hangup calls spin_lock_irqsave (drivers/char/isicom.c:1315) and then calls isicom_shutdown_port. 2. isiscom_shutdown_port calls tty_port_free_xmit_buf at drivers/char/isicom.c:906 3. tty_port_free_xmit_buf calls mutex_lock at drivers/char/tty_port:48 Found by Linux Driver Verification Project. Reported-by: Alexander Strakh <strakh@ispras.ru> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: mxser: Use the new locking rules to fix setserial properlyAlan Cox1-67/+78
Propogate the init/shutdown mutex through the setserial logic. Use the proper locks for the various bits still using the BKL. Kill the BKL in this driver. Updated to fix the bug noted by Dan Carpenter Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: mxser: use the tty_port_open methodAlan Cox1-76/+35
At first this looks a fairly trivial conversion but we can't quite push everything into the right format yet. The open side is easy but care is needed over the setserial methods. Fix up the locking now that we've adopted the port->mutex locking rule for the initialization. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: isicom: sort out the board init logicAlan Cox2-30/+12
Split this into two flags - INIT meaning the board is set up and ACTIVE meaning the board has ports open. Remove the broken HUPCL casing and push the counts somewhere sensible. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: isicom: switch to the new tty_port_open helperAlan Cox1-67/+21
Trivial conversion in this case so might as well do it while testing the port_open design is right Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: tty_port: Add a kref object to the tty portAlan Cox2-0/+30
Users of tty port need a way to refcount ports when hotplugging is involved. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: istallion: tty port open/close methodsAlan Cox1-117/+60
Slice/dice/repeat as with the stallion driver this is just code shuffling and removal Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: stallion: Convert to the tty_port_open/close methodsAlan Cox1-81/+35
The driver is already structured this way so just slice and dice Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: tty_port: Move the IO_ERROR clearAlan Cox1-1/+1
Some devices want to set IO_ERROR in their activate methods so that you can be handed a 'dead' port for operations like setserial. Thus we need to clear the flag before activate so that activate can choose to set the flag and still return 0. This is fine as the file handle/tty are not accessible to the user yet. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: tty_port: Add IO_ERROR bit handlingAlan Cox1-1/+5
To propogate tty_port_open/close to a few other devices we need to start handling the IO_ERROR flag on the tty. We can do this pretty trivially. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: riscom8: switch to the tty_port_open APIAlan Cox1-48/+41
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: tty_port: Change the buffer allocator lockingAlan Cox2-4/+6
We want to be able to do this without regard for the activate/own open method being used which causes a problem using port->mutex. Add another mutex for now. Once everything uses port_open to do buffer allocs we can kill it back off Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: sdio_uart: Fix the locking on "func" for new codeAlan Cox1-0/+4
The new dtr_rts function didn't take the port->func lock as it should so add use of the lock there. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: sdio_uart: add modem functionalityAlan Cox1-1/+32
Add the POSIX block for carrier Linux TIOCMIWAIT functionality is still lacking from the driver. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: sdio_uart: Style fixesAlan Cox1-11/+12
Running the current code through checkpatch shows a few bits of noise mostly but not entirely from before the changes. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: sdio_uart: Fix termios handlingAlan Cox1-6/+0
Switching between two non standard baud rates fails because of the cflag test. Do as we did elsewhere and just kill the "optimisation". Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: sdio_uart: Switch to the open/close helpersAlan Cox1-82/+119
Gets us proper tty semantics, removes some code and fixes up a few corner case races (hangup during open etc) Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11sdio_uart: Move the open lockAlan Cox1-11/+9
When we move to the tty_port logic the port mutex will protect open v close v hangup. Move to this first in the existing open code so we have a bisection point. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11sdio_uart: refcount the tty objectsAlan Cox1-17/+42
The tty can go away underneath us, so we must refcount it. Do the naïve implementation initially. We will worry about startup shortly. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11sdio_uart: Fix oops caused by the previous changesetNicolas Pitre1-1/+1
Now... testing reveals that the very first patch "sdio_uart: use tty_port" causes a segmentation fault in sdio_uart_open(): Unable to handle kernel NULL pointer dereference at virtual address 00000084 pgd = dfb44000 [00000084] *pgd=1fb99031, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] PREEMPT last sysfs file: /sys/devices/platform/mvsdio/mmc_host/mmc0/mmc0:f111/uevent Modules linked in: CPU: 0 Not tainted (2.6.32-rc5-next-20091102-00001-gb36eae9 #10) PC is at sdio_uart_open+0x204/0x2cc [...] Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11sdio_uart: use tty_portAlan Cox1-18/+23
Add a tty_port object to the sdio uart. For the moment just begin using the tty field of the port, as this is the critical one to clean up. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty_port: Move hupcl handlingAlan Cox1-5/+8
Move the HUCPL handling from the end of close_port_start to the beginning of close_port_end. What this actually does is change the ordering from port shutdown port->dtr_rts to port->dtr_rts port shutdown Some hardware drops the physical connection on shutdown so we must perform the port operations before the shutdown. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11devpts_get_tty() should validate inodeSukadev Bhattiprolu1-2/+14
devpts_get_tty() assumes that the inode passed in is associated with a valid pty. But if the only reference to the pty is via a bind-mount, the inode passed to devpts_get_tty() while valid, would refer to a pty that no longer exists. With a lot of debug effort, Grzegorz Nosek developed a small program (see below) to reproduce a crash on recent kernels. This crash is a regression introduced by the commit: commit 527b3e4773628b30d03323a2cb5fb0d84441990f Author: Sukadev Bhattiprolu <sukadev@us.ibm.com> Date: Mon Oct 13 10:43:08 2008 +0100 To fix, ensure that the dentry associated with the inode has not yet been deleted/unhashed by devpts_pty_kill(). See also: https://lists.linux-foundation.org/pipermail/containers/2009-July/019273.html tty-bug.c: #define _GNU_SOURCE #include <fcntl.h> #include <sched.h> #include <stdlib.h> #include <sys/mount.h> #include <sys/signal.h> #include <unistd.h> #include <stdio.h> #include <linux/fs.h> void dummy(int sig) { } static int child(void *unused) { int fd; signal(SIGINT, dummy); signal(SIGHUP, dummy); pause(); /* cheesy synchronisation to wait for /dev/pts/0 to appear */ mount("/dev/pts/0", "/dev/console", NULL, MS_BIND, NULL); sleep(2); fd = open("/dev/console", O_RDWR); dup(0); dup(0); write(1, "Hello world!\n", sizeof("Hello world!\n")-1); return 0; } int main(void) { pid_t pid; char *stack; stack = malloc(16384); pid = clone(child, stack+16384, CLONE_NEWNS|SIGCHLD, NULL); open("/dev/ptmx", O_RDWR|O_NOCTTY|O_NONBLOCK); unlockpt(fd); grantpt(fd); sleep(2); kill(pid, SIGHUP); sleep(1); return 0; /* exit before child opens /dev/console */ } Reported-by: Grzegorz Nosek <root@localdomain.pl> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Tested-by: Serge Hallyn <serue@us.ibm.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11Serial: Do not read IIR in serial8250_start_tx when UART_BUG_TXENIan Jackson1-5/+3
Do not read IIR in serial8250_start_tx when UART_BUG_TXEN Reading the IIR clears some oustanding interrupts so it is not safe. Instead, simply transmit immediately if the buffer is empty without regard to IIR. Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Jiri Kosina <jkosina@suse.cz> Cc: Alan Cox <alan@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11tty: docs: serial/tty, add to ldisc methodsTilman Schmidt1-2/+7
A small addition to the ldisc method descriptions. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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