Commit ee2daf71 authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Add __percpu annotation for __percpu_read()/__percpu_write() 



When build kernel with C=1, we get:

arch/loongarch/kernel/process.c:234:46: warning: incorrect type in argument 1 (different address spaces)
arch/loongarch/kernel/process.c:234:46:    expected void *ptr
arch/loongarch/kernel/process.c:234:46:    got unsigned long [noderef] __percpu *
arch/loongarch/kernel/process.c:234:46: warning: incorrect type in argument 1 (different address spaces)
arch/loongarch/kernel/process.c:234:46:    expected void *ptr
arch/loongarch/kernel/process.c:234:46:    got unsigned long [noderef] __percpu *
arch/loongarch/kernel/process.c:234:46: warning: incorrect type in argument 1 (different address spaces)
arch/loongarch/kernel/process.c:234:46:    expected void *ptr
arch/loongarch/kernel/process.c:234:46:    got unsigned long [noderef] __percpu *
arch/loongarch/kernel/process.c:234:46: warning: incorrect type in argument 1 (different address spaces)
arch/loongarch/kernel/process.c:234:46:    expected void *ptr
arch/loongarch/kernel/process.c:234:46:    got unsigned long [noderef] __percpu *

Add __percpu annotation for __percpu_read()/__percpu_write() can avoid
such warnings. __percpu_xchg() and other functions don't need annotation
because their wrapper, i.e. _pcp_protect(), already suppresses warnings.

Also adjust the indentations in this file.

Reported-by: default avatarkernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311080409.LlOfTR3m-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202311080840.Vc2kXhfp-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202311081340.3k72KKdg-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202311120926.cjYHyoYw-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202311152142.g6UyNx1R-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202311160339.DbhaH8LX-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202311181454.CTPrSYmQ-lkp@intel.com/


Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent aa0cbc1b

arch/loongarch/include/asm/percpu.h

+5 −6
Original line number Diff line number Diff line
@@ -63,7 +63,7 @@ PERCPU_OP(and, and, &) 
PERCPU_OP(or, or, |)

#undef PERCPU_OP



static __always_inline unsigned long __percpu_read(void *ptr, int size)

static __always_inline unsigned long __percpu_read(void __percpu *ptr, int size)

{

	unsigned long ret;
@@ -100,7 +100,7 @@ static __always_inline unsigned long __percpu_read(void *ptr, int size) 
	return ret;

}



static __always_inline void __percpu_write(void *ptr, unsigned long val, int size)

static __always_inline void __percpu_write(void __percpu *ptr, unsigned long val, int size)

{

	switch (size) {

	case 1:
@@ -132,8 +132,7 @@ static __always_inline void __percpu_write(void *ptr, unsigned long val, int siz 
	}

}



static __always_inline unsigned long __percpu_xchg(void *ptr, unsigned long val,

						   int size)

static __always_inline unsigned long __percpu_xchg(void *ptr, unsigned long val, int size)

{

	switch (size) {

	case 1: