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2005-08-29[PATCH] convert signal handling of NODEFER to act like other Unix boxes.Steven Rostedt1-2/+3
It has been reported that the way Linux handles NODEFER for signals is not consistent with the way other Unix boxes handle it. I've written a program to test the behavior of how this flag affects signals and had several reports from people who ran this on various Unix boxes, confirming that Linux seems to be unique on the way this is handled. The way NODEFER affects signals on other Unix boxes is as follows: 1) If NODEFER is set, other signals in sa_mask are still blocked. 2) If NODEFER is set and the signal is in sa_mask, then the signal is still blocked. (Note: this is the behavior of all tested but Linux _and_ NetBSD 2.0 *). The way NODEFER affects signals on Linux: 1) If NODEFER is set, other signals are _not_ blocked regardless of sa_mask (Even NetBSD doesn't do this). 2) If NODEFER is set and the signal is in sa_mask, then the signal being handled is not blocked. The patch converts signal handling in all current Linux architectures to the way most Unix boxes work. Unix boxes that were tested: DU4, AIX 5.2, Irix 6.5, NetBSD 2.0, SFU 3.5 on WinXP, AIX 5.3, Mac OSX, and of course Linux 2.6.13-rcX. * NetBSD was the only other Unix to behave like Linux on point #2. The main concern was brought up by point #1 which even NetBSD isn't like Linux. So with this patch, we leave NetBSD as the lonely one that behaves differently here with #2. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-23[PATCH] qualifiers in return types - easy casesAl Viro1-1/+1
a bunch of functions switched from volatile to __attribute__((noreturn)) and from const to __attribute_pure__ Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-15[ARM] Add syscall stubs for inotify and ioprio system callsRobert Love1-0/+6
Signed-off-by: Robert Love <rml@novell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-10[ARM SMP] Clear the exclusive monitor on ARMv6 CPUs on context switchRussell King1-0/+7
Ensure that the exclusive monitor is cleared on context switch with ARMv6 CPUs. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-04[PATCH] pci and yenta: pcibios_bus_to_resourceDominik Brodowski1-0/+17
In yenta_socket, we default to using the resource setting of the CardBus bridge. However, this is a PCI-bus-centric view of resources and thus needs to be converted to generic resources first. Therefore, add a call to pcibios_bus_to_resource() call in between. This function is a mere wrapper on x86 and friends, however on some others it already exists, is added in this patch (alpha, arm, ppc, ppc64) or still needs to be provided (parisc -- where is its pcibios_resource_to_bus() ?). Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-28[ARM SMP] Ensure secondary CPUs have a clean TLBRussell King1-0/+1
Since ARMv6 CPUs will not flush the TLB on context switches, it is possible that we may end up with some global TLB entries remaining present, eventually upsetting userspace. Explicitly flush the entire TLB on secondary CPUs as they startup, after we have switched to the init_mm page tables. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-26[PATCH] Don't export machine_restart, machine_halt, or machine_power_off.Eric W. Biederman1-4/+0
machine_restart, machine_halt and machine_power_off are machine specific hooks deep into the reboot logic, that modules have no business messing with. Usually code should be calling kernel_restart, kernel_halt, kernel_power_off, or emergency_restart. So don't export machine_restart, machine_halt, and machine_power_off so we can catch buggy users. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-17[PATCH] ARM SMP: Mark CPU init functions/data with __cpuinit/...dataRussell King1-3/+3
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-16[PATCH] ARM: Allow register_undef_hook to be called with IRQs offRussell King1-4/+8
Preserve the interrupt status across a call to register_undef_hook. This allows it to be called while interrupts are disabled. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11[PATCH] ARM SMP: Initialise cpu_present_mapRussell King1-0/+1
Rather than relying on the fixup code in init/main.c, explicitly initialise cpu_present_map. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11[PATCH] ARM SMP: We list IRQs for present CPUs, not online CPUsRussell King1-1/+1
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11[PATCH] ARM SMP: Rename cpu_present_mask to cpu_possible_mapRussell King1-2/+2
The kernel's terminology for this is cpu_possible_map not cpu_present_mask. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-06[PATCH] ARM: 2791/1: Add CRCs for aliased ARM symbolsTodd Poynor1-0/+3
Patch from Todd Poynor Fix module versioning for 3 ARM symbols that do not have CRCs added, avoid "disagrees about version of symbol struct_module" errors at module load time. From David Singleton. Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-04[PATCH] ARM: Change 'param_offset' to 'boot_params'Russell King1-2/+2
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-01[PATCH] ARM: Make the magic values in head.S more obviousRussell King1-12/+8
Make the magic address values in head.S more obvious as to where they came from. Wrap all debug code in CONFIG_DEBUG_LL. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-30[PATCH] ARM: Don't try to send a signal to pid0Russell King1-10/+2
If we receive an unrecognised abort during boot, don't try to send a signal to pid0, but instead report the current state. This leads to less confusing debug reports. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29[PATCH] ARM: 2723/2: remove __udivdi3 and __umoddi3 from the kernelNicolas Pitre1-6/+0
Patch from Nicolas Pitre Those are big, slow and generally not recommended for kernel code. They are even not present on i386. So it should be concluded that one could as well get away with do_div() alone. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29[PATCH] ARM: 2769/1: cpu_init() stack setup fixCatalin Marinas1-1/+2
Patch from Catalin Marinas The compiler allocates r14 for the stk variable in the __asm__ directive. This is a shadowed register and gets changed when the mode is changed, causing random values in the SP register. The patch adds a clobber for the r14 register. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-28[PATCH] ARM SMP: Add IPI support code for SMP TLB flushingRussell King1-0/+123
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27[PATCH] ARM: Add VST idle loop callRussell King2-4/+11
This call allows the dynamic tick support to reprogram the timer immediately before the CPU idles. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-26[PATCH] arm: swsusp build fixAndrew Morton1-1/+1
Another swsusp fixup. Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-25[PATCH] ARM: Generic Dynamic Tick Timer support for ARM, take 4Russell King2-0/+117
This patch adds support for Dynamic Tick Timer for ARM. Dynamic Tick is also known as VST (Variable Scheduling Timeouts). Dynamic Tick has been in use in the OMAP tree since last October. The patch is not intrusive, and does not do anything unless CONFIG_NO_IDLE_HZ is defined. This patch has the following fixed based on comments from RMK: - Time is updated before calling interrupt handlers. - Added new interrupt flag SA_TIMER to avoid duplicate timer interrupts - Moved struct dyn_tick_timer to time.h until we at some point probably have an arch independent dyn-tick.h - Cleaned up testing for DYN_TICK_ENABLED in irq.c I've cleaned up this patch to fix some remaining issues: - Call the timer tick handler with irqs disabled, as it would be from a normal interrupt - if we have a dyn_tick, we better implement all methods. - generic timer_dyn_reprogram() call, to be called before sleeping - added command line option - "dyntick=" to allow boot-time control of this feature -- rmk Signed-off-by: Tony Lindgren Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22[PATCH] ARM: Ensure memory information is page alignedRussell King1-9/+16
Ensure that meminfo.bank[] array contains page-aligned start/size information. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22[PATCH] ARM: Move signal return code into vector pageRussell King3-10/+40
Move the signal return code into the vector page instead of placing it on the user mode stack, which will allow us to avoid flushing the instruction cache on signals, as well as eventually allowing non-exec stack. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6Linus Torvalds1-6/+6
2005-06-20[PATCH] Driver Core: arch: update device attribute callbacksYani Ioannou1-6/+6
Signed-off-by: Yani Ioannou <yani.ioannou@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-20[PATCH] ARM: Remove obsolete arch/arm/kernel/arch.cRussell King2-47/+1
This is not used anymore - RiscPC now contains the necessary supporting code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19[PATCH] ARM SMP: Messages about CPUs should be prefixed by CPU%uRussell King1-1/+2
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19Merge with ../linux-2.6-smpRussell King2-0/+151
2005-06-19[PATCH] ARM SMP: Fix PXA/SA11x0 suspend resume crashRussell King1-1/+1
We need to re-initialise the stack pointers for undefined, IRQ and abort mode handlers whenever we resume. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-18[PATCH] ARM SMP: Add support for startup of secondary processorsRussell King2-0/+151
Create a temporary page table to startup secondary processors. This page table must have a 1:1 virtual/physical mapping for the kernel in addition to the standard mappings to ensure that the secondary CPU can enable its MMU safely. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-18Merge with ../linux-2.6-smpRussell King3-123/+190
2005-06-08[PATCH] ARM: 2664/2: add support for atomic ops on pre-ARMv6 SMP systemsNicolas Pitre2-5/+60
Patch from Nicolas Pitre Not that there might be many of them on the planet, but at least RMK apparently has one. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-31[PATCH] ARM SMP: Fix vector entryRussell King2-85/+139
The current vector entry system does not allow for SMP. In order to work around this, we need to eliminate our reliance on the fixed save areas, which breaks the way we enable alignment traps. This patch changes the way we handle the save areas such that we can have one per CPU. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-31[PATCH] ARM SMP: convert alignment enableRussell King2-5/+6
The current vector entry system does not allow for SMP. In order to work around this, we need to eliminate our reliance on the fixed save areas, which breaks the way we enable alignment traps. This patch makes the alignment trap enable code independent of the way we handle the save areas. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21[PATCH] ARM SMP: add IPI supportRussell King1-0/+14
Add support for inter-processor interrupts to the main IRQ handling code. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21[PATCH] ARM SMP: reallocate main IRQ handler code registersRussell King1-19/+16
By changing r9 -> r8 and r8 to 'tsk' (r9) we are able to remove one instruction from the preempt path. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21[PATCH] ARM SMP: consolidate main IRQ handler codeRussell King1-14/+15
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-05[PATCH] ARM: 2665/1: kill warnings in entry-armv.SNicolas Pitre1-2/+2
Patch from Nicolas Pitre Signed-off-by: Nicolas Pitre Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-05[PATCH] ARM: 2663/1: straightify TLS register emulation a bit moreNicolas Pitre2-11/+10
Patch from Nicolas Pitre This better express things, and should cover RMK's weird SMP toys. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-05[PATCH] ARM: Fix kernel stack offset calculationsRussell King5-17/+19
Various places in the ARM kernel implicitly assumed that kernel stacks are always 8K due to hard coded constants. Replace these constants with definitions. Correct the allowable range of kernel stack pointer values within the allocation. Arrange for the entire kernel stack to be zeroed, not just the upper 4K if CONFIG_DEBUG_STACK_USAGE is set. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-01[PATCH] convert that currently tests _NSIG directly to use valid_signal()Jesper Juhl1-2/+3
Convert most of the current code that uses _NSIG directly to instead use valid_signal(). This avoids gcc -W warnings and off-by-one errors. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01[PATCH] consolidate sys_shmatStephen Rothwell1-12/+0
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-29[PATCH] ARM: 2651/3: kernel helpers for NPTL supportNicolas Pitre2-9/+262
Patch from Nicolas Pitre This patch entirely reworks the kernel assistance for NPTL on ARM. In particular this provides an efficient way to retrieve the TLS value and perform atomic operations without any instruction emulation nor special system call. This even allows for pre ARMv6 binaries to be forward compatible with SMP systems without any penalty. The problematic and performance critical operations are performed through segment of kernel provided user code reachable from user space at a fixed address in kernel memory. Those fixed entry points are within the vector page so we basically get it for free as no extra memory page is required and nothing else may be mapped at that location anyway. This is different from (but doesn't preclude) a full blown VDSO implementation, however a VDSO would prevent some assembly tricks with constants that allows for efficient branching to those code segments. And since those code segments only use a few cycles before returning to user code, the overhead of a VDSO far call would add a significant overhead to such minimalistic operations. The ARM_NR_set_tls syscall also changed number. This is done for two reasons: 1) this patch changes the way the TLS value was previously meant to be retrieved, therefore we ensure whatever library using the old way gets fixed (they only exist in private tree at the moment since the NPTL work is still progressing). 2) the previous number was allocated in a range causing an undefined instruction trap on kernels not supporting that syscall and it was determined that allocating it in a range returning -ENOSYS would be much nicer for libraries trying to determine if the feature is present or not. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-04-26[PATCH] ARM: make entry*.S includes more logicalRussell King4-22/+12
Move common includes to entry-header, and file specific includes to the relevant file. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26[PATCH] ARM: Remove single-use user save/restore macrosRussell King2-54/+25
Assembly macros are pointless if they're only used once. Move them inline. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26[PATCH] ARM: remove PT_TRACESYSRussell King1-2/+0
PT_TRACESYS is unused, remove it. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26[PATCH] ARM: Remove SVC_MODE definitionRussell King2-5/+1
SVC_MODE reflects the MODE_SVC definition in asm/ptrace.h. Use the asm/ptrace.h definition instead, and remove SVC_MODE. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26[PATCH] ARM: Use __NR_SYSCALL_BASE and __ARM_NR_BASE in asm codeRussell King2-27/+15
Don't define our own local constants, but use those already defined in asm/unistd.h instead. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26[PATCH] ARM: pt_regs offsetsRussell King3-28/+30
Generate pt_regs S_xx offsets from the structure itself instead of #defining them. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
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