- 12 Jan, 2006 5 commits
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Russell King authored
This is part of a patch from Marc Singer to allow r2 to be passed to the kernel. Marc's original comments follow: This revised R2 (atags pointer) patch incorporates comments from Nico Pitre and Ben Dooks. It modifies the head.S files such that the R2 value set by the bootloader is conveyed to the kernel startup code. The kernel head.S heuristically validates the pointer. It will set R2 to zero if it believes the pointer is invalid. Presently, it requires that the ATAGS list reside in the first 16KiB of physical RAM. Relaxing this contraint may be both desirable as well as tricky. Signed-off-by: Marc Singer <elf@buici.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Catalin Marinas authored
Patch from Catalin Marinas If the low interrupt latency mode is enabled for the CPU (from ARMv6 onwards), the ldm/stm instructions are no longer atomic. An ldm instruction restoring the sp and pc registers can be interrupted immediately after sp was updated but before the pc. If this happens, the CPU restores the base register to the value before the ldm instruction but if the base register is not sp, the interrupt routine will corrupt the stack and the restarted ldm instruction will load garbage. Note that future ARM cores might always run in the low interrupt latency mode. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Richard Purdie authored
Patch from Richard Purdie This patch adds a check to see if the pxa i2c interface is enabled before allowing it to be used and resets it if found to be disabled. This automatically restores the interface if the device has been suspended and resumed without causing any suspend/resume call ordering issues. The patch also fixes a build warning and adds an appropriate module licence (the module is gpl according to the header). Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Catalin Marinas authored
Patch from Catalin Marinas Since ARM1176, the CPU ID format has changed and it will also be used for future ARM architectures. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Kevin Hilman authored
Patch from Kevin Hilman This patch increase available DMA-consistent memory allocated by dma_coherent_alloc(). The default remains at 2M (defined in asm/memory.h) and each platform has the ability to override in asm/arch-foo/memory.h. Signed-off-by: Kevin Hilman <kevin@hilman.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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- 10 Jan, 2006 9 commits
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Nicolas Pitre authored
Patch from Nicolas Pitre Depending on your gcc version, the current C-only implementation would produce suboptimal code, ranging from a bad register selection forcing an additional mov instruction to a failure to merge the eor and the ror in a single instruction. With a little help gcc always produces the best code. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Richard Purdie authored
Patch from Richard Purdie Change mainstone and sharpsl pxa2xx pcmcia drivers to use platform_device_alloc which fixes a memory leak. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Andrew Victor authored
#3244) Patch from Andrew Victor This patch adds support to the 2.6 kernel series for the Atmel AT91RM9200 processor. This patch is the support for the Cogent CSB337 and CSB637 boards. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Andrew Victor authored
Patch from Andrew Victor This patch adds support to the 2.6 kernel series for the Atmel AT91RM9200 processor. This patch is the support for Atmel's DK and EK boards. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Andrew Victor authored
Patch from Andrew Victor This patch adds support to the 2.6 kernel series for the Atmel AT91RM9200 processor. This patch is the Serial driver. This version uses the newly re-written GPL'ed hardware headers. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Linus Torvalds authored
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Linus Torvalds authored
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Oleg Nesterov authored
I think it is better to set ->next_pending in the caller, when it is needed. This saves one parameter, and this coincides with cpu_quiet() beahaviour, which sets ->completed = ->cur itself. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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- 09 Jan, 2006 26 commits
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Ingo Molnar authored
convert the block loop device from semaphores to completions. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Aleksey Makarov authored
The patch changes semaphores that are initialized as locked to complete(). Source: MontaVista Software, Inc. Modified-by: Steven Rostedt <rostedt@goodmis.org> The following patch is from Montavista. I modified it slightly. Semaphores are currently being used where it makes more sense for completions. This patch corrects that. Signed-off-by: Aleksey Makarov <amakarov@ru.mvista.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Steven Rostedt authored
change CPU3WDT semaphores to completions. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Steven Rostedt authored
change SX8 semaphores to completions. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
This patch converts the superblock-lock semaphore to a mutex, affecting lock_super()/unlock_super(). Tested on ext3 and XFS. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Jes Sorensen authored
This patch converts the inode semaphore to a mutex. I have tested it on XFS and compiled as much as one can consider on an ia64. Anyway your luck with it might be different. Modified-by: Ingo Molnar <mingo@elte.hu> (finished the conversion) Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Jes Sorensen authored
This patch switches XFS over to use the new mutex code directly as opposed to the previous workaround patch I posted earlier that avoided the namespace clash by forcing it back to semaphores. This falls in the 'works for me<tm>' category. Signed-off-by: Jes Sorensen <jes@trained-monkey.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
more mutex debugging: check for held locks during memory freeing, task exit, enable sysrq printouts, etc. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Ingo Molnar authored
mutex implementation - add debugging code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Ingo Molnar authored
Add mutex design related documentation. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Ingo Molnar authored
mutex implementation, core files: just the basic subsystem, no users of it. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Arjan van de Ven authored
add the per-arch mutex.h files for the remaining architectures. We default to asm-generic/mutex-dec.h, because that performs quite well on most arches. Arches that do not have atomic decrement/increment instructions should switch to mutex-xchg.h instead. Arches can also provide their own implementation for the mutex fastpath primitives. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Nicolas Pitre authored
add the ARM version of mutex.h, which is optimized in assembly for ARMv6, and uses the xchg implementation on pre-ARMv6. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
add the x86_64 version of mutex.h, optimized in assembly. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Arjan van de Ven authored
add the i386 version of mutex.h, optimized in assembly. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
Add three (generic) mutex fastpath implementations. The mutex-xchg.h implementation is atomic_xchg() based, and should work fine on every architecture. The mutex-dec.h implementation is atomic_dec_return() based - this one too should work on every architecture, but might not perform the most optimally on architectures that have no atomic-dec/inc instructions. The mutex-null.h implementation forces all calls into the slowpath. This is used for mutex debugging, but it can also be used on platforms that do not want (or need) a fastpath at all. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Chuck Ebbert authored
add typecheck_fn(type, function) to do type-checking of function pointers. Modified-by: Ingo Molnar <mingo@elte.hu> (made it typeof() based, instead of typedef based.) Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
add atomic_xchg() to all the architectures. Needed by the new mutex code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
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Jesper Juhl authored
Here's a small patch with a few tiny fixups for the EHCI Kconfig help text. Please consider applying. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Adrian Bunk <bunk@stusta.de>
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Adrian Bunk authored
Signed-off-by: Adrian Bunk <bunk@stusta.de>
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Adrian Bunk authored
This patch removes two outdated changelog files. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Dave Jones <davej@redhat.com>
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Adrian Bunk authored
Leonard N. Zubkoff passed away in August 2002. Signed-off-by: Adrian Bunk <bunk@stusta.de>
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Adrian Bunk authored
Additionally, one comment was reformulated by Joe Perches <joe@perches.com>. Signed-off-by: Adrian Bunk <bunk@stusta.de>
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Linus Torvalds authored
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Linus Torvalds authored
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Adrian Bunk authored
Signed-off-by: Adrian Bunk <bunk@stusta.de>
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