This is a note to let you know that I've just added the patch titled bitops: protect find_first_{,zero}_bit properly to the 5.16-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bitops-protect-find_first_-zero-_bit-properly.patch and it can be found in the queue-5.16 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From b7ec62d7ee0f0b8af6ba190501dff7f9ee6545ca Mon Sep 17 00:00:00 2001 From: Yury Norov <yury.norov@xxxxxxxxx> Date: Sat, 14 Aug 2021 14:16:57 -0700 Subject: bitops: protect find_first_{,zero}_bit properly From: Yury Norov <yury.norov@xxxxxxxxx> 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@xxxxxxxxx> Fixes: 2cc7b6a44ac2 ("lib: add fast path for find_first_*_bit() and find_last_bit()") Reported-by: kernel test robot <lkp@xxxxxxxxx> Tested-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/asm-generic/bitops/find.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/include/asm-generic/bitops/find.h +++ b/include/asm-generic/bitops/find.h @@ -97,6 +97,7 @@ unsigned long find_next_zero_bit(const u #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 unsig 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 return _find_first_zero_bit(addr, size); } +#endif + #else /* CONFIG_GENERIC_FIND_FIRST_BIT */ #ifndef find_first_bit Patches currently in stable-queue which might be from yury.norov@xxxxxxxxx are queue-5.16/bitops-protect-find_first_-zero-_bit-properly.patch