]> git.baikalelectronics.ru Git - kernel.git/commit
locking: Fix qspinlock/x86 inline asm error
authorGuo Jin <guoj17@chinatelecom.cn>
Tue, 8 Nov 2022 06:01:26 +0000 (14:01 +0800)
committerPeter Zijlstra <peterz@infradead.org>
Wed, 16 Nov 2022 09:18:09 +0000 (10:18 +0100)
commitc80a1c8120e2523361edbb615190dda5a4235b55
tree87fd1b3ade8b44b36a217194135154a07364a21a
parent517674129a87097f2eaee1352ae1e3b0842b2421
locking: Fix qspinlock/x86 inline asm error

When compiling linux 6.1.0-rc3 configured with CONFIG_64BIT=y and
CONFIG_PARAVIRT_SPINLOCKS=y on x86_64 using LLVM 11.0, an error:
"<inline asm> error: changed section flags for .spinlock.text,
expected:: 0x6" occurred.

The reason is the .spinlock.text in kernel/locking/qspinlock.o
is used many times, but its flags are omitted in subsequent use.

LLVM 11.0 assembler didn't permit to
leave out flags in subsequent uses of the same sections.

So this patch adds the corresponding flags to avoid above error.

Fixes: 7a2303202d4a ("locking: Add __lockfunc to slow path functions")
Signed-off-by: Guo Jin <guoj17@chinatelecom.cn>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20221108060126.2505-1-guoj17@chinatelecom.cn
arch/x86/include/asm/qspinlock_paravirt.h