From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp,
linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org,
Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH 1/2] h8300: Correct signature of test_bit()
Date: Tue, 3 Jan 2017 18:52:49 +0100 [thread overview]
Message-ID: <1483465970-11728-1-git-send-email-geert@linux-m68k.org> (raw)
mm/filemap.c: In function 'clear_bit_unlock_is_negative_byte':
mm/filemap.c:933:9: warning: passing argument 2 of 'test_bit' discards 'volatile' qualifier from pointer target type
return test_bit(PG_waiters, mem);
^
In file included from include/linux/bitops.h:36:0,
from include/linux/kernel.h:10,
from include/linux/list.h:8,
from include/linux/wait.h:6,
from include/linux/fs.h:5,
from include/linux/dax.h:4,
from mm/filemap.c:14:
arch/h8300/include/asm/bitops.h:68:90: 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 <geert@linux-m68k.org>
---
Exposed by commit 98473f9f3f9bd404 ("mm/filemap: fix parameters to
test_bit()").
---
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 05999aba1d6ab364..30eaf5b9bf7319ad 100644
--- a/arch/h8300/include/asm/bitops.h
+++ b/arch/h8300/include/asm/bitops.h
@@ -65,7 +65,7 @@ static inline void FNAME(int nr, volatile unsigned long *addr) \
#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;
--
1.9.1
next reply other threads:[~2017-01-03 17:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-03 17:52 Geert Uytterhoeven [this message]
2017-01-03 17:52 ` [PATCH 2/2] m68k/bitops: Correct signature of test_bit() Geert Uytterhoeven
2017-03-06 10:32 ` Geert Uytterhoeven
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