vfs: fix warning: 'dirent' is used uninitialized in this function
Using:
gcc (GCC) 4.5.0 20100610 (prerelease)
The following warnings appear:
fs/readdir.c: In function `filldir64':
fs/readdir.c:240:15: warning: `dirent' is used uninitialized in this function
fs/readdir.c: In function `filldir':
fs/readdir.c:155:15: warning: `dirent' is used uninitialized in this function
fs/compat.c: In function `compat_filldir64':
fs/compat.c:1071:11: warning: `dirent' is used uninitialized in this function
fs/compat.c: In function `compat_filldir':
fs/compat.c:984:15: warning: `dirent' is used uninitialized in this function
The warnings are related to the use of the NAME_OFFSET() macro. Luckily,
it appears as though the standard offsetof() macro is what is being
implemented by NAME_OFFSET(), thus we can fix the warning and use a more
standard code construct at the same time.
Signed-off-by: Kevin Winchester <kjwinchester@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/compat.c b/fs/compat.c
index c6fda9a..5976bad8 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -15,6 +15,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/linkage.h>
#include <linux/compat.h>
@@ -891,8 +892,6 @@
return retval;
}
-#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
-
struct compat_old_linux_dirent {
compat_ulong_t d_ino;
compat_ulong_t d_offset;
@@ -981,7 +980,8 @@
struct compat_linux_dirent __user * dirent;
struct compat_getdents_callback *buf = __buf;
compat_ulong_t d_ino;
- int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
+ int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
+ namlen + 2, sizeof(compat_long_t));
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
@@ -1068,8 +1068,8 @@
{
struct linux_dirent64 __user *dirent;
struct compat_getdents_callback64 *buf = __buf;
- int jj = NAME_OFFSET(dirent);
- int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
+ int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
+ sizeof(u64));
u64 off;
buf->error = -EINVAL; /* only used if we fail.. */