kernel.git/arch/arm/kernel/process.c, branch linux-2.6.32.y

ARM: 7161/1: errata: no automatic store buffer drain

2011-12-09T17:21:36Z

commit 11ed0ba1754841316d4095478944300acf19acc3 upstream. This patch implements a workaround for PL310 erratum 769419. On revisions of the PL310 prior to r3p2, the Store Buffer does not automatically drain. This can cause normal, non-cacheable writes to be retained when the memory system is idle, leading to suboptimal I/O performance for drivers using coherent DMA. This patch adds an optional wmb() call to the cpu_idle loop. On systems with an outer cache, this causes an explicit flush of the store buffer. Acked-by: Catalin Marinas Tested-by: Marc Zyngier Signed-off-by: Will Deacon Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman

ARM: 5759/1: Add register information of threads to coredump

2009-10-14T09:33:05Z

Defines ELF_CORE_COPY_TASK_REGS so that CPU register information of every thread is included in coredump. Without this, only the faulting thread is coredumped. Cc: Roger Quadros Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Mika Westerberg Signed-off-by: Artem Bityutskiy Signed-off-by: Russell King

Thumb-2: Implementation of the unified start-up and exceptions code

2009-07-24T11:32:54Z

This patch implements the ARM/Thumb-2 unified kernel start-up and exception handling code. Signed-off-by: Catalin Marinas

[ARM] idle: clean up pm_idle calling, obey hlt_counter

2009-06-22T21:34:55Z

pm_idle is used by infrastructure (eg, cpuidle) which expects architectures to call it in a certain way. Arrange for ARM to follow x86's lead on this and call pm_idle() with interrupts already disabled. However, we expect pm_idle() to enable interrupts before it returns. Also, OMAP wants to be able to disable hlt-ing, so allow hlt_counter to prevent all calls to pm_idle. Signed-off-by: Russell King

[ARM] 5559/1: Limit the stack unwinding caused by a kthread exit

2009-06-19T15:44:23Z

When a kthread function returns, it branches to do_exit(). However, the unwinding information isn't valid anymore and any stack trace caused by do_exit() may be incorrect. This patch adds a kernel_thread_exit() function and annotated with '.cantunwind' so that the unwinder stops when reaching it. Tested-by: Tony Lindgren Signed-off-by: Catalin Marinas Signed-off-by: Russell King

Add core support for ARMv6/v7 big-endian

2009-05-30T13:00:18Z

Starting with ARMv6, the CPUs support the BE-8 variant of big-endian (byte-invariant). This patch adds the core support: - setting of the BE-8 mode via the CPSR.E register for both kernel and user threads - big-endian page table walking - REV used to rotate instructions read from memory during fault processing as they are still little-endian format - Kconfig and Makefile support for BE-8. The --be8 option must be passed to the final linking stage to convert the instructions to little-endian Signed-off-by: Catalin Marinas

Simplify copy_thread()

2009-04-03T02:04:51Z

First argument unused since 2.3.11. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alexey Dobriyan Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[ARM] pass reboot command line to arch_reset()

2009-03-19T16:20:24Z

OMAP wishes to pass state to the boot loader upon reboot in order to instruct it whether to wait for USB-based reflashing or not. There is already a facility to do this via the reboot() syscall, except we ignore the string passed to machine_restart(). This patch fixes things to pass this string to arch_reset(). This means that we keep the reboot mode limited to telling the kernel _how_ to perform the reboot which should be independent of what we request the boot loader to do. Acked-by: Tony Lindgren Signed-off-by: Russell King

[ARM] 5382/1: unwind: Reorganise the stacktrace support

2009-02-12T13:21:17Z

This patch changes the walk_stacktrace and its callers for easier integration of stack unwinding. The arch/arm/kernel/stacktrace.h file is also moved to arch/arm/include/asm/stacktrace.h. Signed-off-by: Catalin Marinas Signed-off-by: Russell King

[ARM] Convert asm/uaccess.h to linux/uaccess.h

2008-09-06T10:35:55Z

Signed-off-by: Russell King