linux/fs/ext2
Arnd Bergmann e952813e21 ext2: avoid bogus -Wmaybe-uninitialized warning
On ARM, we get this false-positive warning since the rework of
the ext2_get_blocks interface:

fs/ext2/inode.c: In function 'ext2_get_block':
include/linux/buffer_head.h:340:16: error: 'bno' may be used uninitialized in this function [-Werror=maybe-uninitialized]

The calling conventions for this function are rather complex, and it's
not surprising that the compiler gets this wrong, I spent a long time
trying to understand how it all fits together myself.

This change to avoid the warning makes sure the compiler sees that we
always set 'bno' pointer whenever we have a positive return code.
The transformation is correct because we always arrive at the 'got_it'
label with a positive count that gets used as the return value, while
any branch to the 'cleanup' label has a negative or zero 'err'.

Fixes: 6750ad7198 ("ext2: stop passing buffer_head to ext2_get_blocks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2016-10-18 11:29:35 +02:00
..
acl.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
acl.h ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
balloc.c ext2: fix filesystem deadlock while reading corrupted xattr block 2016-07-05 22:02:41 -04:00
dir.c fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps 2016-09-27 21:06:22 -04:00
ext2.h ext2: use iomap to implement DAX 2016-09-19 11:30:29 +10:00
file.c Merge branch 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 17:11:50 -07:00
ialloc.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
inode.c ext2: avoid bogus -Wmaybe-uninitialized warning 2016-10-18 11:29:35 +02:00
ioctl.c fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps 2016-09-27 21:06:22 -04:00
Kconfig ext2: use iomap to implement DAX 2016-09-19 11:30:29 +10:00
Makefile ext2: remove xip.c and xip.h 2015-02-16 17:56:03 -08:00
namei.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
super.c fs: Replace CURRENT_TIME with current_time() for inode timestamps 2016-09-27 21:06:21 -04:00
symlink.c vfs: Remove {get,set,remove}xattr inode operations 2016-10-07 21:48:36 -04:00
xattr_security.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_trusted.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_user.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr.c fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps 2016-09-27 21:06:22 -04:00
xattr.h mbcache2: rename to mbcache 2016-02-22 22:35:22 -05:00