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Sebastian Andrzej Siewior 8a3a5110c3 pstore/core: drop cmpxchg based updates 
commit d5a9bf0b38d2ac85c9a693c7fb851f74fd2a2494 upstream.

I have here a FPGA behind PCIe which exports SRAM which I use for
pstore. Now it seems that the FPGA no longer supports cmpxchg based
updates and writes back 0xff…ff and returns the same.  This leads to
crash during crash rendering pstore useless.
Since I doubt that there is much benefit from using cmpxchg() here, I am
dropping this atomic access and use the spinlock based version.

Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Rabin Vincent <rabinv@axis.com>
Tested-by: Rabin Vincent <rabinv@axis.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
[kees: remove "_locked" suffix since it's the only option now]
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28 03:01:27 -04:00
..
9p
9p: use file_dentry()
2016-08-10 11:49:27 +02:00
adfs
…
affs
affs: fix remount failure when there are no options changed
2016-06-07 18:14:32 -07:00
afs
…
autofs4
autofs: use dentry flags to block walks during expire
2016-09-30 10:18:37 +02:00
befs
…
bfs
…
btrfs
btrfs: assign error values to the correct bio structs
2016-10-22 12:26:54 +02:00
cachefiles
FS-Cache: Add missing initialization of ret in cachefiles_write_page()
2015-11-16 20:38:43 -05:00
ceph
ceph: fix race during filling readdir cache
2016-10-07 15:23:42 +02:00
cifs
CIFS: Fix a possible invalid memory access in smb2_query_symlink()
2016-08-20 18:09:20 +02:00
coda
fs/coda: fix readlink buffer overflow
2015-09-10 13:29:01 -07:00
configfs
configfs: allow dynamic group creation
2015-11-20 16:17:32 -08:00
cramfs
…
debugfs
debugfs: Make automount point inodes permanently empty
2016-05-04 14:48:41 -07:00
devpts
devpts: clean up interface to pty drivers
2016-08-16 09:30:49 +02:00
dlm
dlm: free workqueues after the connections
2016-10-22 12:26:56 +02:00
ecryptfs
ecryptfs: fix handling of directory opening
2016-09-15 08:27:47 +02:00
efivarfs
efi: Make efivarfs entries immutable by default
2016-03-03 15:07:09 -08:00
efs
…
exofs
osd fs: __r4w_get_page rely on PageUptodate for uptodate
2015-12-12 10:15:34 -08:00
exportfs
…
ext2
ext2, ext4: warn when mounting with dax enabled
2015-11-16 09:43:54 -08:00
ext4
ext4: release bh in make_indexed_dir
2016-10-22 12:26:56 +02:00
f2fs
fscrypto: add authorization check for setting encryption policy
2016-09-24 10:07:34 +02:00
fat
fat: fix fake_offset handling on error path
2015-11-20 16:17:32 -08:00
freevxfs
…
fscache
FS-Cache: Handle a write to the page immediately beyond the EOF marker
2015-11-11 02:11:02 -05:00
fuse
fuse: fix killing s[ug]id in setattr
2016-10-22 12:26:55 +02:00
gfs2
Merge branch 'for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-11-13 18:02:30 -08:00
hfs
hfs: fix B-tree corruption after insertion at position 0
2015-09-10 13:29:01 -07:00
hfsplus
xattr handlers: Pass handler to operations instead of flags
2015-11-13 20:34:32 -05:00
hostfs
hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()
2016-09-30 10:18:39 +02:00
hpfs
hpfs: implement the show_options method
2016-06-01 12:15:54 -07:00
hugetlbfs
fs/hugetlbfs/inode.c: fix bugs in hugetlb_vmtruncate_list()
2016-02-25 12:01:22 -08:00
isofs
get_rock_ridge_filename(): handle malformed NM entries
2016-05-18 17:06:54 -07:00
jbd2
jbd2: make journal y2038 safe
2016-08-20 18:09:20 +02:00
jffs2
jffs2: reduce the breakage on recovery from halfway failed rename()
2016-03-16 08:42:58 -07:00
jfs
fs/jfs: remove unnecessary new_valid_dev() checks
2015-11-09 15:11:24 -08:00
kernfs
kernfs: don't depend on d_find_any_alias() when generating notifications
2016-09-24 10:07:36 +02:00
lockd
Mainly smaller bugfixes and cleanup. We're still finding some bugs from
2015-11-11 20:11:28 -08:00
logfs
mm, fs: introduce mapping_gfp_constraint()
2015-11-06 17:50:42 -08:00
minix
…
ncpfs
ncpfs: fix a braino in OOM handling in ncp_fill_cache()
2016-03-16 08:42:59 -07:00
nfs
pNFS/flexfiles: Fix layoutcommit after a commit to DS
2016-10-07 15:23:45 +02:00
nfs_common
lockd: NLM grace period shouldn't block NFSv4 opens
2015-08-13 10:22:06 -04:00
nfsd
nfsd: Close race between nfsd4_release_lockowner and nfsd4_lock
2016-09-24 10:07:36 +02:00
nilfs2
fs/nilfs2: fix potential underflow in call to crc32_le
2016-08-10 11:49:25 +02:00
nls
…
notify
fanotify: fix list corruption in fanotify_get_response()
2016-09-30 10:18:37 +02:00
ntfs
mm, fs: introduce mapping_gfp_constraint()
2015-11-06 17:50:42 -08:00
ocfs2
ocfs2: fix start offset to ocfs2_zero_range_for_truncate()
2016-09-30 10:18:34 +02:00
omfs
…
openpromfs
…
overlayfs
ovl: fix workdir creation
2016-09-15 08:27:52 +02:00
proc
mm: introduce get_task_exe_file
2016-09-24 10:07:36 +02:00
pstore
pstore/core: drop cmpxchg based updates
2016-10-28 03:01:27 -04:00
qnx4
…
qnx6
…
quota
quota: Fix possible GPF due to uninitialised pointers
2016-04-12 09:08:56 -07:00
ramfs
mm, fs: obey gfp_mapping for add_to_page_cache()
2015-10-16 11:42:28 -07:00
reiserfs
reiserfs: switch to generic_{get,set,remove}xattr()
2016-10-22 12:26:55 +02:00
romfs
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squashfs
squashfs: xattr simplifications
2015-11-13 20:34:33 -05:00
sysfs
sysfs: correctly handle read offset on PREALLOC attrs
2016-09-07 08:32:46 +02:00
sysv
fix sysvfs symlinks
2015-11-23 21:11:08 -05:00
tracefs
tracefs: Fix refcount imbalance in start_creating()
2015-11-04 22:13:45 -05:00
ubifs
ubifs: Fix assertion in layout_in_gaps()
2016-09-15 08:27:53 +02:00
udf
udf: Check output buffer length when converting name to CS0
2016-02-25 12:01:18 -08:00
ufs
fix ufs write vs readpage race when writing into a hole
2015-09-09 10:43:12 -07:00
xfs
xfs: prevent dropping ioend completions during buftarg wait
2016-09-30 10:18:37 +02:00
aio.c
aio: mark AIO pseudo-fs noexec
2016-10-07 15:23:47 +02:00
anon_inodes.c
…
attr.c
vfs: move permission checking into notify_change() for utimes(NULL)
2016-10-22 12:26:56 +02:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
libnvdimm for 4.4:
2015-11-10 12:07:22 -08:00
binfmt_elf.c
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-11-11 09:45:24 -08:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
…
binfmt_script.c
…
block_dev.c
block: detach bdev inode from its wb in __blkdev_put()
2015-12-04 11:02:17 -07:00
buffer.c
vfs: remove unused wrapper block_page_mkwrite()
2015-11-11 02:19:33 -05:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
i2c-dev: Fix typo in ioctl name reference
2015-10-23 23:26:43 +02:00
compat.c
…
coredump.c
fs/coredump: prevent fsuid=0 dumps into user-controlled directories
2016-04-12 09:08:58 -07:00
dax.c
dax: disable pmd mappings
2015-11-16 23:54:45 -08:00
dcache.c
fs/dcache.c: avoid soft-lockup in dput()
2016-08-16 09:30:50 +02:00
dcookies.c
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direct-io.c
block: fix use-after-free in dio_bio_complete
2016-03-03 15:07:28 -08:00
drop_caches.c
inode: convert inode_sb_list_lock to per-sb
2015-08-17 18:39:46 -04:00
eventfd.c
…
eventpoll.c
…
exec.c
…
fcntl.c
…
fhandle.c
fs/coredump: prevent fsuid=0 dumps into user-controlled directories
2016-04-12 09:08:58 -07:00
file_table.c
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file.c
vfs: clear remainder of 'full_fds_bits' in dup_fd()
2015-11-05 23:05:32 -08:00
filesystems.c
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fs_pin.c
…
fs_struct.c
…
fs-writeback.c
writeback, cgroup: fix use of the wrong bdi_writeback which mismatches the inode
2016-04-12 09:09:04 -07:00
inode.c
vfs: fix deadlock in file_remove_privs() on overlayfs
2016-08-10 11:49:30 +02:00
internal.h
inode: rename i_wb_list to i_io_list
2015-08-17 23:38:10 -04:00
ioctl.c
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Kconfig
dax: disable pmd mappings
2015-11-16 23:54:45 -08:00
Kconfig.binfmt
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libfs.c
fs: Set the size of empty dirs to 0.
2015-08-12 15:28:45 -05:00
locks.c
locks: use file_inode()
2016-08-10 11:49:27 +02:00
Makefile
ext4: promote ext4 over ext2 in the default probe order
2015-10-15 10:33:21 -04:00
mbcache.c
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mount.h
…
mpage.c
mm, fs: introduce mapping_gfp_constraint()
2015-11-06 17:50:42 -08:00
namei.c
fs: Check for invalid i_uid in may_follow_link()
2016-09-15 08:27:49 +02:00
namespace.c
namespace: update event counter when umounting a deleted dentry
2016-08-10 11:49:27 +02:00
no-block.c
…
nsfs.c
fs/seq_file: convert int seq_vprint/seq_printf/etc... returns to void
2015-09-11 15:21:34 -07:00
open.c
vfs: add vfs_select_inode() helper
2016-05-18 17:06:48 -07:00
pipe.c
pipe: limit the per-user amount of pages allocated in pipes
2016-06-07 18:14:35 -07:00
pnode.c
propogate_mnt: Handle the first propogated copy being a slave
2016-05-11 11:21:19 +02:00
pnode.h
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posix_acl.c
posix_acl: Add set_posix_acl
2016-07-27 09:47:30 -07:00
proc_namespace.c
vfs: show_vfsstat: do not ignore errors from show_devname method
2016-04-12 09:08:55 -07:00
read_write.c
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readdir.c
…
select.c
…
seq_file.c
fs/seq_file: fix out-of-bounds read
2016-09-07 08:32:43 +02:00
signalfd.c
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splice.c
splice: handle zero nr_pages in splice_to_pipe()
2016-04-12 09:08:55 -07:00
stack.c
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stat.c
fs/stat.c: remove unnecessary new_valid_dev() check
2015-11-09 15:11:24 -08:00
statfs.c
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super.c
writeback: flush inode cgroup wb switches instead of pinning super_block
2016-03-09 15:34:52 -08:00
sync.c
fs/sync.c: make sync_file_range(2) use WB_SYNC_NONE writeback
2015-11-06 17:50:42 -08:00
timerfd.c
timerfd: Handle relative timers with CONFIG_TIME_LOW_RES proper
2016-02-25 12:01:25 -08:00
userfaultfd.c
userfaultfd: don't block on the last VM updates at exit time
2016-03-16 08:43:01 -07:00
utimes.c
vfs: move permission checking into notify_change() for utimes(NULL)
2016-10-22 12:26:56 +02:00
xattr.c
9p: xattr simplifications
2015-11-13 20:34:33 -05:00