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200b812d00
linux/arch/arm/kernel
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Catalin Marinas 200b812d00 Clear the exclusive monitor when returning from an exception 
The patch adds a CLREX or dummy STREX to the exception return path. This
is needed because several atomic/locking operations use a pair of
LDREX/STREXEQ and the EQ condition may not always be satisfied. This
would leave the exclusive monitor status set and may cause problems with
atomic/locking operations in the interrupted code.

With this patch, the atomic_set() operation can be a simple STR
instruction (on SMP systems, the global exclusive monitor is cleared by
STR anyway). Clearing the exclusive monitor during context switch is no
longer needed as this is handled by the exception return path anyway.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Jamie Lokier <jamie@shareable.org>
2009-09-18 23:30:11 +01:00
..
.gitignore [ARM] 5194/1: update .gitignore 2008-08-12 19:54:09 +01:00
armksyms.c [ARM] support tracing when using newer compilers 2009-08-13 20:34:36 +02:00
arthur.c [ARM] arm/kernel/arthur.c: add MODULE_LICENSE 2008-05-17 22:55:16 +01:00
asm-offsets.c arm: use kbuild.h instead of macros in asm-offsets.c 2008-04-29 08:06:29 -07:00
atags.c clean up atags exporting code 2008-05-30 10:33:49 +02:00
atags.h [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags 2008-02-04 13:21:03 +00:00
bios32.c PCI: arm: use generic INTx swizzle from PCI core 2009-01-07 11:13:13 -08:00
calls.S ARM: 5677/1: ARM support for TIF_RESTORE_SIGMASK/pselect6/ppoll/epoll_pwait 2009-08-15 15:10:31 +01:00
compat.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
compat.h
crunch-bits.S [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
crunch.c [ARM] 5577/2: ep93xx: syscon locked register functions 2009-07-09 16:10:51 +01:00
debug.S [ARM] 5412/1: XSCALE: add ice dcc support 2009-02-27 20:57:46 +00:00
dma-isa.c [ARM] dma: make DMA_MODE_xxx reflect ISA DMA settings 2009-01-02 12:18:53 +00:00
dma.c [ARM] dma: remove dmamode_t typedef 2009-01-02 12:34:55 +00:00
ecard.c arm: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:43 -08:00
ecard.h [ARM] rpc: ecard: remove deprecated ecard_address() and relatives 2008-07-03 14:25:58 +01:00
elf.c [ARM] disable NX support for OABI-supporting kernels 2009-05-23 11:36:20 +01:00
entry-armv.S Clear the exclusive monitor when returning from an exception 2009-09-18 23:30:11 +01:00
entry-common.S Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-09-14 17:48:14 -07:00
entry-header.S Clear the exclusive monitor when returning from an exception 2009-09-18 23:30:11 +01:00
fiq.c [ARM] 5421/1: ftrace: fix crash due to tracing of __naked functions 2009-03-12 21:33:03 +00:00
ftrace.c small doc fix: ftrace_dyn_arch_init is called by ftrace_init 2008-12-12 11:15:45 +01:00
head-common.S Thumb-2: Implementation of the unified start-up and exceptions code 2009-07-24 12:32:54 +01:00
head-nommu.S nommu: Do not override the CP15 control reg value returned from initfunc 2009-07-24 12:34:59 +01:00
head.S Thumb-2: Implementation of the unified start-up and exceptions code 2009-07-24 12:32:54 +01:00
init_task.c mm: consolidate init_mm definition 2009-06-16 19:47:28 -07:00
io.c [ARM] Convert asm/io.h to linux/io.h 2008-09-06 12:10:45 +01:00
irq.c ARM: Show FIQ in /proc/interrupts on CONFIG_FIQ 2009-08-17 00:00:41 +01:00
isa.c [ARM] arch/arm/kernel/isa.c: missing definition of register_isa_ports 2009-01-08 15:53:08 +00:00
iwmmxt.S [ARM] 3707/1: iwmmxt: use the generic thread notifier infrastructure 2006-07-01 19:56:48 +01:00
kgdb.c kgdb, x86, arm, mips, powerpc: ignore user space single stepping 2008-09-26 10:36:41 -05:00
kprobes-decode.c [ARM] 5221/1: fix ldm/stm emulation for kprobes 2008-09-01 12:06:33 +01:00
kprobes.c kprobes: add kprobe_insn_mutex and cleanup arch_remove_kprobe() 2009-01-06 15:59:20 -08:00
machine_kexec.c [ARM] Storage class should be before const qualifier 2009-02-10 09:59:19 +00:00
Makefile [ARM] 5613/1: implement CALLER_ADDRESSx 2009-07-21 17:21:28 +01:00
module.c Thumb-2: Add support for loadable modules 2009-07-24 12:32:59 +01:00
process.c Thumb-2: Implementation of the unified start-up and exceptions code 2009-07-24 12:32:54 +01:00
ptrace.c nommu: ptrace support 2009-07-24 12:34:58 +01:00
ptrace.h [ARM] ptrace: clean up single stepping support 2007-04-21 20:34:58 +01:00
relocate_kernel.S [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags 2008-02-04 13:21:03 +00:00
return_address.c [ARM] 5613/1: implement CALLER_ADDRESSx 2009-07-21 17:21:28 +01:00
setup.c Thumb-2: Implementation of the unified start-up and exceptions code 2009-07-24 12:32:54 +01:00
signal.c Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-09-14 17:48:14 -07:00
signal.h
smp_scu.c [ARM] 5516/1: Flush the D-cache after initialising the SCU 2009-05-28 13:52:05 +01:00
smp_twd.c [ARM] smp: fix style issues in smp_twd.c 2009-05-17 19:16:41 +01:00
smp.c Merge branch 'for-rmk' of git://linux-arm.org/linux-2.6 into devel 2009-06-11 15:35:00 +01:00
stacktrace.c [ARM] 5613/1: implement CALLER_ADDRESSx 2009-07-21 17:21:28 +01:00
sys_arm.c [ARM] Convert asm/uaccess.h to linux/uaccess.h 2008-09-06 11:35:55 +01:00
sys_oabi-compat.c Separate out common fstatat code into vfs_fstatat 2009-04-20 23:02:51 -04:00
thumbee.c Fix the teehbr_read function prototype 2008-11-10 14:14:11 +00:00
time.c [ARM] 5382/1: unwind: Reorganise the stacktrace support 2009-02-12 13:21:17 +00:00
traps.c [ARM] 5383/2: unwind: Add core support for ARM stack unwinding 2009-02-19 11:26:24 +00:00
unwind.c Thumb-2: Implementation of the unified start-up and exceptions code 2009-07-24 12:32:54 +01:00
vmlinux.lds.S Merge branch 'master' into for-next 2009-07-04 07:13:18 +09:00
xscale-cp0.c [ARM] Convert asm/io.h to linux/io.h 2008-09-06 12:10:45 +01:00