From 5743ee22bf3f8842f2330925434a727e1044e2a1 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 21 Jun 2018 21:24:44 +0200 Subject: [PATCH] h8300: Correct signature of test_bit() mm/filemap.c: In function 'clear_bit_unlock_is_negative_byte': mm/filemap.c:1181:30: warning: passing argument 2 of 'test_bit' discards 'volatile' qualifier from pointer target type [-Wdiscarded-qualifiers] return test_bit(PG_waiters, mem); ^~~ In file included from include/linux/bitops.h:38, from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/wait.h:7, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/dax.h:5, from mm/filemap.c:14: arch/h8300/include/asm/bitops.h:69:57: note: expected 'const long unsigned int *' but argument is of type 'volatile void *' static inline int test_bit(int nr, const unsigned long *addr) ~~~~~~~~~~~~~~~~~~~~~^~~~ Make the bitmask pointed to by the "addr" parameter volatile to fix this, like is done on other architectures. Signed-off-by: Geert Uytterhoeven Signed-off-by: Yoshinori Sato --- arch/h8300/include/asm/bitops.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/h8300/include/asm/bitops.h b/arch/h8300/include/asm/bitops.h index b7ac7cf6f0de..647a83bd40b7 100644 --- a/arch/h8300/include/asm/bitops.h +++ b/arch/h8300/include/asm/bitops.h @@ -66,7 +66,7 @@ H8300_GEN_BITOP(change_bit, "bnot") #undef H8300_GEN_BITOP -static inline int test_bit(int nr, const unsigned long *addr) +static inline int test_bit(int nr, const volatile unsigned long *addr) { int ret = 0; unsigned char *b_addr; -- 2.20.1