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)
commit23df39fc6a36183af5e6e4f47523f1ad2cdc1d30
tree87fd1b3ade8b44b36a217194135154a07364a21a
parent094226ad94f471a9f19e8f8e7140a09c2625abaa
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: 501f7f69bca1 ("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