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authorEric W. Biederman <ebiederm@xmission.com>2011-10-17 13:40:02 -0700
committerroot <root@serles.lst.de>2011-10-28 14:58:53 +0200
commit1448c721e4fa2faf742029a0403b4b787fccb7fa (patch)
treef79332dccc85550b4c16510840850e11115cfff0 /arch/powerpc/include/asm
parenta877ee03ac010ded434b77f7831f43cbb1fcc60f (diff)
downloadlinaro-lsk-1448c721e4fa2faf742029a0403b4b787fccb7fa.tar.gz
compat: sync compat_stats with statfs.
This was found by inspection while tracking a similar bug in compat_statfs64, that has been fixed in mainline since decemeber. - This fixes a bug where not all of the f_spare fields were cleared on mips and s390. - Add the f_flags field to struct compat_statfs - Copy f_flags to userspace in case someone cares. - Use __clear_user to copy the f_spare field to userspace to ensure that all of the elements of f_spare are cleared. On some architectures f_spare is has 5 ints and on some architectures f_spare only has 4 ints. Which makes the previous technique of clearing each int individually broken. I don't expect anyone actually uses the old statfs system call anymore but if they do let them benefit from having the compat and the native version working the same. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/powerpc/include/asm')
-rw-r--r--arch/powerpc/include/asm/compat.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index 91010e8f847..88e602f6430 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -100,7 +100,8 @@ struct compat_statfs {
compat_fsid_t f_fsid;
int f_namelen; /* SunOS ignores this field. */
int f_frsize;
- int f_spare[5];
+ int f_flags;
+ int f_spare[4];
};
#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff