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: kernel 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: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/include/asm/percpu.h b/arch/loongarch/include/asm/percpu.h
index ed5da02b1cf6f1611ac4b83e560d1f544ed6e270..9b36ac003f8907ed06a279c94bb49ede82b213b2 100644 (file)
--- a/arch/loongarch/include/asm/percpu.h
+++ b/arch/loongarch/include/asm/percpu.h
@@ -40,13 +40,13 @@ static __always_inline unsigned long __percpu_##op(void *ptr,               \
        switch (size) {                                                 \
        case 4:                                                         \
                __asm__ __volatile__(                                   \
-               "am"#asm_op".w" " %[ret], %[val], %[ptr]        \n"             \
+               "am"#asm_op".w" " %[ret], %[val], %[ptr]        \n"     \
                : [ret] "=&r" (ret), [ptr] "+ZB"(*(u32 *)ptr)           \
                : [val] "r" (val));                                     \
                break;                                                  \
        case 8:                                                         \
                __asm__ __volatile__(                                   \
-               "am"#asm_op".d" " %[ret], %[val], %[ptr]        \n"             \
+               "am"#asm_op".d" " %[ret], %[val], %[ptr]        \n"     \
                : [ret] "=&r" (ret), [ptr] "+ZB"(*(u64 *)ptr)           \
                : [val] "r" (val));                                     \
                break;                                                  \
@@ -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: