linux-toradex.git/include/linux/bitops.h, branch Colibri_T30_LinuxImageV2.1Beta2_20140206

bitops: remove for_each_set_bit_cont()

2012-04-15T20:56:14+00:00

Remove for_each_set_bit_cont() after confirming that no one uses
for_each_set_bit_cont() anymore.

[sfr@canb.auug.org.au: regmap: cope with bitops API change]
Signed-off-by: Akinobu Mita 
Signed-off-by: Stephen Rothwell 
Cc: Robert Richter 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: Mark Brown 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Cherry-pick from mainline 0a329d2

Change-Id: I6655096e5d58a1215b225035daa8dd8a2f6327d9
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96496
Reviewed-by: Automatic_Commit_Validation_User

arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT}

2011-05-27T00:12:38+00:00

By the previous style change, CONFIG_GENERIC_FIND_NEXT_BIT,
CONFIG_GENERIC_FIND_BIT_LE, and CONFIG_GENERIC_FIND_LAST_BIT are not used
to test for existence of find bitops anymore.

Signed-off-by: Akinobu Mita 
Acked-by: Greg Ungerer 
Cc: Arnd Bergmann 
Cc: Russell King 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

bitops: add #ifndef for each of find bitops

2011-05-27T00:12:38+00:00

The style that we normally use in asm-generic is to test the macro itself
for existence, so in asm-generic, do:

	#ifndef find_next_zero_bit_le
	extern unsigned long find_next_zero_bit_le(const void *addr,
		unsigned long size, unsigned long offset);
	#endif

and in the architectures, write

	static inline unsigned long find_next_zero_bit_le(const void *addr,
		unsigned long size, unsigned long offset)
	#define find_next_zero_bit_le find_next_zero_bit_le

This adds the #ifndef for each of the find bitops in the generic header
and source files.

Suggested-by: Arnd Bergmann 
Signed-off-by: Akinobu Mita 
Acked-by: Russell King 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Greg Ungerer 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

bitops: Provide generic sign_extend32 function

2010-11-15T18:27:04+00:00

This patch moves code out from wireless drivers where two different
functions are defined in three code locations for the same purpose and
provides a common function to sign extend a 32-bit value.

Signed-off-by: Andreas Herrmann 
Signed-off-by: John W. Linville

bitops: remove duplicated extern declarations

2010-10-09T19:51:45+00:00

If CONFIG_GENERIC_FIND_NEXT_BIT is enabled, find_next_bit() and
find_next_zero_bit() are doubly declared in asm-generic/bitops/find.h
and linux/bitops.h.

asm/bitops.h includes asm-generic/bitops/find.h if and only if the
architecture enables CONFIG_GENERIC_FIND_NEXT_BIT. And asm/bitops.h
is included by linux/bitops.h

So we can just remove the extern declarations of find_next_bit() and
find_next_zero_bit() in linux/bitops.h.

Also we can remove unneeded #ifndef CONFIG_GENERIC_FIND_NEXT_BIT in
asm-generic/bitops/find.h.

Signed-off-by: Akinobu Mita 
Signed-off-by: Arnd Bergmann

bitops: make asm-generic/bitops/find.h more generic

2010-10-09T19:51:44+00:00

asm-generic/bitops/find.h has the extern declarations of find_next_bit()
and find_next_zero_bit() and the macro definitions of find_first_bit()
and find_first_zero_bit(). It is only usable by the architectures which
enables CONFIG_GENERIC_FIND_NEXT_BIT and disables
CONFIG_GENERIC_FIND_FIRST_BIT.

x86 and tile enable both CONFIG_GENERIC_FIND_NEXT_BIT and
CONFIG_GENERIC_FIND_FIRST_BIT. These architectures cannot include
asm-generic/bitops/find.h in their asm/bitops.h. So ifdefed extern
declarations of find_first_bit and find_first_zero_bit() are put in
linux/bitops.h.

This makes asm-generic/bitops/find.h usable by these architectures
and use it. Also this change is needed for the forthcoming duplicated
extern declarations cleanup.

Signed-off-by: Akinobu Mita 
Signed-off-by: Arnd Bergmann 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: x86@kernel.org
Cc: Chris Metcalf

Merge branch 'core-hweight-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-05-18T16:17:01+00:00

* 'core-hweight-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, hweight: Use a 32-bit popcnt for __arch_hweight32()
  arch, hweight: Fix compilation errors
  x86: Add optimized popcnt variants
  bitops: Optimize hweight() by making use of compile-time evaluation

arch, hweight: Fix compilation errors

2010-05-04T17:25:27+00:00

Fix function prototype visibility issues when compiling for non-x86
architectures. Tested with crosstool
(ftp://ftp.kernel.org/pub/tools/crosstool/) with alpha, ia64 and sparc
targets.

Signed-off-by: Borislav Petkov 
LKML-Reference: <20100503130736.GD26107@aftab>
Signed-off-by: H. Peter Anvin

bitops: remove temporary for_each_bit()

2010-04-07T15:38:01+00:00

Migration has been completed so remove this now.  There's one straggler in
linux-next's drivers/mtd/sm_ftl.c.  A patch has been sent.

Cc: Akinobu Mita 
Cc: Stephen Rothwell 
Cc: David Woodhouse 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

bitops: Optimize hweight() by making use of compile-time evaluation

2010-04-06T22:52:11+00:00

Rename the extisting runtime hweight() implementations to
__arch_hweight(), rename the compile-time versions to __const_hweight()
and then have hweight() pick between them.

Suggested-by: H. Peter Anvin 
Signed-off-by: Peter Zijlstra 
LKML-Reference: <20100318111929.GB11152@aftab>
Acked-by: H. Peter Anvin 
LKML-Reference: <1265028224.24455.154.camel@laptop>
Signed-off-by: H. Peter Anvin