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xtensa: fix change_bit in exclusive access option
author
Max Filippov
<jcmvbkbc@gmail.com>
Wed, 16 Oct 2019 04:51:43 +0000
(21:51 -0700)
committer
Max Filippov
<jcmvbkbc@gmail.com>
Wed, 16 Oct 2019 07:14:33 +0000
(
00:14
-0700)
change_bit implementation for XCHAL_HAVE_EXCLUSIVE case changes all bits
except the one required due to copy-paste error from clear_bit.
Cc: stable@vger.kernel.org # v5.2+
Fixes:
f7c34874f04a
("xtensa: add exclusive atomics support")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
arch/xtensa/include/asm/bitops.h
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diff --git
a/arch/xtensa/include/asm/bitops.h
b/arch/xtensa/include/asm/bitops.h
index
aeb15f4
..
be8b2be
100644
(file)
--- a/
arch/xtensa/include/asm/bitops.h
+++ b/
arch/xtensa/include/asm/bitops.h
@@
-148,7
+148,7
@@
static inline void change_bit(unsigned int bit, volatile unsigned long *p)
" getex %0\n"
" beqz %0, 1b\n"
: "=&a" (tmp)
- : "a" (
~
mask), "a" (p)
+ : "a" (mask), "a" (p)
: "memory");
}