Ubuntu-focal-kernel/fs/btrfs
David Sterba 298e6fe65e btrfs: initialize location to fix -Wmaybe-uninitialized in btrfs_lookup_dentry()
BugLink: https://bugs.launchpad.net/bugs/2081278

[ Upstream commit b8e947e9f64cac9df85a07672b658df5b2bcff07 ]

Some arch + compiler combinations report a potentially unused variable
location in btrfs_lookup_dentry(). This is a false alert as the variable
is passed by value and always valid or there's an error. The compilers
cannot probably reason about that although btrfs_inode_by_name() is in
the same file.

   >  + /kisskb/src/fs/btrfs/inode.c: error: 'location.objectid' may be used
   +uninitialized in this function [-Werror=maybe-uninitialized]:  => 5603:9
   >  + /kisskb/src/fs/btrfs/inode.c: error: 'location.type' may be used
   +uninitialized in this function [-Werror=maybe-uninitialized]:  => 5674:5

   m68k-gcc8/m68k-allmodconfig
   mips-gcc8/mips-allmodconfig
   powerpc-gcc5/powerpc-all{mod,yes}config
   powerpc-gcc5/ppc64_defconfig

Initialize it to zero, this should fix the warnings and won't change the
behaviour as btrfs_inode_by_name() accepts only a root or inode item
types, otherwise returns an error.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/linux-btrfs/bd4e9928-17b3-9257-8ba7-6b7f9bbb639a@linux-m68k.org/
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
2024-09-27 10:50:33 +02:00
..
tests
Kconfig
Makefile
acl.c
async-thread.c
async-thread.h
backref.c
backref.h
block-group.c
block-group.h
block-rsv.c
block-rsv.h
btrfs_inode.h
check-integrity.c
check-integrity.h btrfs: replace GPL boilerplate by SPDX -- headers 2018-04-12 16:29:46 +02:00
compression.c
compression.h
ctree.c
ctree.h
delalloc-space.c
delalloc-space.h
delayed-inode.c
delayed-inode.h
delayed-ref.c
delayed-ref.h
dev-replace.c
dev-replace.h
dir-item.c
disk-io.c
disk-io.h
export.c
export.h
extent-tree.c
extent_io.c
extent_io.h
extent_map.c
extent_map.h
file-item.c
file.c
free-space-cache.c
free-space-cache.h
free-space-tree.c
free-space-tree.h
inode-item.c
inode-map.c
inode-map.h
inode.c btrfs: initialize location to fix -Wmaybe-uninitialized in btrfs_lookup_dentry() 2024-09-27 10:50:33 +02:00
ioctl.c
locking.c
locking.h
lzo.c
misc.h
ordered-data.c
ordered-data.h
orphan.c
print-tree.c
print-tree.h
props.c
props.h
qgroup.c
qgroup.h
raid56.c
raid56.h
rcu-string.h
reada.c
ref-verify.c
ref-verify.h
relocation.c
root-tree.c
scrub.c
send.c
send.h
space-info.c
space-info.h
struct-funcs.c
super.c
sysfs.c
sysfs.h
transaction.c
transaction.h
tree-checker.c
tree-checker.h
tree-defrag.c
tree-log.c
tree-log.h
ulist.c
ulist.h
uuid-tree.c
volumes.c
volumes.h
xattr.c
xattr.h
zlib.c
zstd.c