linux-kernel - [PATCH 1/2] h8300: Correct signature of test

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue,  3 Jan 2017 18:52:49 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc:     uclinux-h8-devel@...ts.sourceforge.jp,
        linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH 1/2] h8300: Correct signature of test_bit()

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@...ux-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