iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bitops: protect find_first_{,zero}_bit properly

Browse Source 
commit b7ec62d7ee0f0b8af6ba190501dff7f9ee6545ca upstream.

find_first_bit() and find_first_zero_bit() are not protected with
ifdefs as other functions in find.h. It causes build errors on some
platforms if CONFIG_GENERIC_FIND_FIRST_BIT is enabled.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Fixes: 2cc7b6a44ac2 ("lib: add fast path for find_first_*_bit() and find_last_bit()")
Reported-by: kernel test robot <lkp@intel.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yury Norov 2021-08-14 14:16:57 -07:00 committed by Greg Kroah-Hartman
parent 6ad2daa516
commit fe17064738
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/asm-generic/bitops/find.h
View File

@ -97,6 +97,7 @@ unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
#ifdef CONFIG_GENERIC_FIND_FIRST_BIT
#ifndef find_first_bit
/**
* find_first_bit - find the first set bit in a memory region
* @addr: The address to start the search at
@ -116,7 +117,9 @@ unsigned long find_first_bit(const unsigned long *addr, unsigned long size)
return _find_first_bit(addr, size);
}
#endif
#ifndef find_first_zero_bit
/**
* find_first_zero_bit - find the first cleared bit in a memory region
* @addr: The address to start the search at
@ -136,6 +139,8 @@ unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size)
return _find_first_zero_bit(addr, size);
}
#endif
#else /* CONFIG_GENERIC_FIND_FIRST_BIT */
#ifndef find_first_bit