linux.git/arch/arm/lib, branch v2.6.30 Linux kernel source tree [ARM] barriers: improve xchg, bitops and atomic SMP barriers 2009-05-28T18:39:27+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-05-25T19:58:00+00:00 bac4e960b5ce2453d862beaf20e59aa68af3b43a Mathieu Desnoyers pointed out that the ARM barriers were lacking: - cmpxchg, xchg and atomic add return need memory barriers on architectures which can reorder the relative order in which memory read/writes can be seen between CPUs, which seems to include recent ARM architectures. Those barriers are currently missing on ARM. - test_and_xxx_bit were missing SMP barriers. So put these barriers in. Provide separate atomic_add/atomic_sub operations which do not require barriers. Reported-Reviewed-and-Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Mathieu Desnoyers pointed out that the ARM barriers were lacking:

- cmpxchg, xchg and atomic add return need memory barriers on
  architectures which can reorder the relative order in which memory
  read/writes can be seen between CPUs, which seems to include recent
  ARM architectures. Those barriers are currently missing on ARM.

- test_and_xxx_bit were missing SMP barriers.

So put these barriers in.  Provide separate atomic_add/atomic_sub
operations which do not require barriers.

Reported-Reviewed-and-Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Merge branch 'clps7500' into devel 2008-11-27T12:39:43+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-11-27T12:39:43+00:00 31bccbf39208133415000520c79ebe7b291786df Conflicts: arch/arm/Kconfig 
Conflicts:

	arch/arm/Kconfig
[ARM] clps7500: remove support 2008-11-27T12:38:11+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-10-28T09:43:54+00:00 635f0258e5ae526034486b4ae9020e64bfb7d27e The CLPS7500 platform has not built since 2.6.22-git7 and there seems to be no interest in fixing it. So, remove the platform support. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The CLPS7500 platform has not built since 2.6.22-git7 and there
seems to be no interest in fixing it.  So, remove the platform
support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] remove memzero() 2008-11-27T12:37:59+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-10-27T11:24:09+00:00 59f0cb0fddc14ffc6676ae62e911f8115ebc8ccf As suggested by Andrew Morton, remove memzero() - it's not supported on other architectures so use of it is a potential build breaking bug. Since the compiler optimizes memset(x,0,n) to __memzero() perfectly well, we don't miss out on the underlying benefits of memzero(). Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
As suggested by Andrew Morton, remove memzero() - it's not supported
on other architectures so use of it is a potential build breaking bug.
Since the compiler optimizes memset(x,0,n) to __memzero() perfectly
well, we don't miss out on the underlying benefits of memzero().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Merge branch 'ptebits' into devel 2008-10-09T20:31:56+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-10-09T20:31:56+00:00 6a4690c22f5da1eb1c898b61b6a80da52fbd976f Conflicts: arch/arm/Kconfig 
Conflicts:

	arch/arm/Kconfig
[ARM] 5231/1: Do not save the frame pointer in the csum_partial_copy_* functions 2008-09-01T11:06:35+00:00 Catalin Marinas catalin.marinas@arm.com 2008-08-29T17:31:27+00:00 22acc4e65043d436bc286e6059960fa533e37356 Since the other assembly functions do not seem to save the frame pointer onto the stack, this patch changes the csum_partial_copy_* functions to behave in the same way. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Since the other assembly functions do not seem to save the frame
pointer onto the stack, this patch changes the csum_partial_copy_*
functions to behave in the same way.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5232/1: Do not post-index STRT instruction in clear_user.S 2008-09-01T11:06:34+00:00 Catalin Marinas catalin.marinas@arm.com 2008-08-29T17:31:21+00:00 9c23e5fefaaecd494925258084a31c8ff301ad03 The last strnebt instruction has a post-index of 1 but the address register is set to 0 in the next instruction, so no need for post-indexing. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The last strnebt instruction has a post-index of 1 but the address
register is set to 0 in the next instruction, so no need for
post-indexing.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5227/1: Add the ENDPROC declarations to the .S files 2008-09-01T11:06:34+00:00 Catalin Marinas catalin.marinas@arm.com 2008-08-28T10:22:32+00:00 93ed3970114983543bbebd195bef65db84444ea2 This declaration specifies the "function" type and size for various assembly functions, mainly needed for generating the correct branch instructions in Thumb-2. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
instructions in Thumb-2.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5226/1: remove unmatched comment end. 2008-08-28T16:12:29+00:00 Jean-Christophe DUBOIS jcd@tribudubois.net 2008-08-27T23:00:23+00:00 212496fd9a5f5db0a037a2a8c6fde2d2bd93c1d7 remove unmatched comment end. Signed-off-by: Jean-Christophe DUBOIS <jcd@tribudubois.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
remove unmatched comment end.

Signed-off-by: Jean-Christophe DUBOIS <jcd@tribudubois.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07T08:55:48+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-08-05T15:14:15+00:00 a09e64fbc0094e3073dbb09c3b4bfe4ab669244b This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This just leaves include/asm-arm/plat-* to deal with.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>