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Davidlohr Bueso c8c06efa8b mm: convert i_mmap_mutex to rwsem 
The i_mmap_mutex is a close cousin of the anon vma lock, both protecting
similar data, one for file backed pages and the other for anon memory.  To
this end, this lock can also be a rwsem.  In addition, there are some
important opportunities to share the lock when there are no tree
modifications.

This conversion is straightforward.  For now, all users take the write
lock.

[sfr@canb.auug.org.au: update fremap.c]
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-13 12:42:45 -08:00
..
9p
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
adfs
adfs: add __printf verification, fix format/argument mismatches
2014-08-08 15:57:24 -07:00
affs
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
afs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2014-12-11 14:27:06 -08:00
autofs4
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
befs
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
bfs
fs/bfs: use bfs prefix for dump_imap
2014-08-08 15:57:24 -07:00
btrfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2014-12-12 11:15:23 -08:00
cachefiles
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
ceph
Merge branch 'iov_iter' into for-next
2014-12-08 20:39:29 -05:00
cifs
Merge branch 'akpm' (patchbomb from Andrew)
2014-12-10 18:34:42 -08:00
coda
move d_rcu from overlapping d_child to overlapping d_alias
2014-11-03 15:20:29 -05:00
configfs
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
cramfs
fs/cramfs/inode.c: use linux/uaccess.h
2014-08-08 15:57:25 -07:00
debugfs
Merge tag 'trace-seq-file-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into for-next
2014-11-19 13:02:53 -05:00
devpts
fs/devpts/inode.c: convert printk to pr_foo()
2014-06-06 16:08:14 -07:00
dlm
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
ecryptfs
kill f_dentry uses
2014-11-19 13:01:25 -05:00
efivarfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
efs
fs/efs/namei.c: return is not a function
2014-08-08 15:57:18 -07:00
exofs
Boaz Harrosh - Fix broken email address
2014-10-19 20:22:32 +03:00
exportfs
move d_rcu from overlapping d_child to overlapping d_alias
2014-11-03 15:20:29 -05:00
ext2
ext2: Convert to private i_dquot field
2014-11-10 10:06:10 +01:00
ext3
ext3: Convert to private i_dquot field
2014-11-10 10:06:10 +01:00
ext4
Lots of bugs fixes, including Zheng and Jan's extent status shrinker
2014-12-12 09:28:03 -08:00
f2fs
f2fs: avoid to ra unneeded blocks in recover flow
2014-12-08 14:19:09 -08:00
fat
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
freevxfs
…
fscache
fs/fscache/object-list.c: use __seq_open_private()
2014-10-13 17:52:21 +01:00
fuse
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
gfs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
hfs
fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp
2014-12-10 17:41:16 -08:00
hfsplus
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-06-12 10:30:18 -07:00
hostfs
hostfs: support rename flags
2014-08-07 14:40:09 -04:00
hpfs
fs/hpfs/dnode.c: fix suspect code indent
2014-08-08 15:57:22 -07:00
hppfs
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
hugetlbfs
mm: convert i_mmap_mutex to rwsem
2014-12-13 12:42:45 -08:00
isofs
isofs: avoid unused function warning
2014-11-19 13:09:37 -05:00
jbd
jbd: Deletion of an unnecessary check before the function call "iput"
2014-11-18 10:15:29 +01:00
jbd2
Lots of bugs fixes, including Zheng and Jan's extent status shrinker
2014-12-12 09:28:03 -08:00
jffs2
[jffs2] kill wbuf_queued/wbuf_dwork_lock
2014-10-09 02:39:01 -04:00
jfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
kernfs
switch d_materialise_unique() users to d_splice_alias()
2014-11-19 13:01:20 -05:00
lockd
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
logfs
fs/logfs/readwrite.c: kernel-doc warning fixes
2014-08-06 18:01:12 -07:00
minix
minix zmap block counts calculation fix
2014-08-08 15:57:20 -07:00
ncpfs
Merge branch 'akpm' (patchbomb from Andrew)
2014-12-10 18:34:42 -08:00
nfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
nfs_common
lockd: move lockd's grace period handling into its own module
2014-09-17 16:33:11 -04:00
nfsd
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2014-12-11 14:27:06 -08:00
nilfs2
nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races
2014-12-10 17:41:16 -08:00
nls
…
notify
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
ntfs
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
ocfs2
Merge branch 'akpm' (patchbomb from Andrew)
2014-12-10 18:34:42 -08:00
omfs
FS/OMFS: block number sanity check during fill_super operation
2014-10-14 02:18:22 +02:00
openpromfs
…
overlayfs
Merge branch 'iov_iter' into for-next
2014-12-08 20:39:29 -05:00
proc
Merge branch 'akpm' (patchbomb from Andrew)
2014-12-10 18:34:42 -08:00
pstore
pstore-ram: Allow optional mapping with pgprot_noncached
2014-12-11 13:38:31 -08:00
qnx4
…
qnx6
fs/qnx6: update debugging to current functions
2014-08-08 15:57:26 -07:00
quota
vfs: Remove i_dquot field from inode
2014-11-10 10:06:18 +01:00
ramfs
fs/ramfs/file-nommu.c: replace count*size kzalloc by kcalloc
2014-08-08 15:57:18 -07:00
reiserfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2014-12-12 10:08:06 -08:00
romfs
fs/romfs/super.c: add blank line after declarations
2014-08-08 15:57:25 -07:00
squashfs
fs/squashfs/super.c: logging cleanup
2014-08-06 18:01:13 -07:00
sysfs
…
sysv
…
ubifs
UBIFS: fix a couple bugs in UBIFS xattr length calculation
2014-11-07 12:32:22 +02:00
udf
udf: One function call less in udf_fill_super() after error detection
2014-11-19 21:56:06 +01:00
ufs
fs/ufs/balloc.c: remove unused variable
2014-10-14 02:18:20 +02:00
xfs
xfs: update for 3.19-rc1
2014-12-12 09:48:17 -08:00
aio.c
Merge git://git.kvack.org/~bcrl/aio-fixes
2014-11-25 18:55:44 -08:00
anon_inodes.c
…
attr.c
fs,userns: Change inode_capable to capable_wrt_inode_uidgid
2014-06-10 13:57:22 -07:00
bad_inode.c
bad_inode: add ->rename2()
2014-08-07 14:40:09 -04:00
binfmt_aout.c
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
binfmt_elf_fdpic.c
handle suicide on late failure exits in execve() in search_binary_handler()
2014-10-09 02:39:00 -04:00
binfmt_elf.c
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2014-12-11 17:56:37 -08:00
binfmt_em86.c
…
binfmt_flat.c
fs/binfmt_flat.c: make old_reloc() static
2014-06-04 16:54:21 -07:00
binfmt_misc.c
fs/binfmt_misc.c: use GFP_KERNEL instead of GFP_USER
2014-12-10 17:41:12 -08:00
binfmt_script.c
…
binfmt_som.c
…
block_dev.c
fs: add freeze_super/thaw_super fs hooks
2014-11-17 10:35:17 +00:00
buffer.c
fs: clarify rate limit suppressed buffer I/O errors
2014-10-21 13:55:11 -06:00
char_dev.c
fs/char_dev.c: remove pointless assignment from __register_chrdev_region()
2014-12-10 17:41:04 -08:00
compat_binfmt_elf.c
…
compat_ioctl.c
Bluetooth: Move HCI socket definitions into its own header file
2014-07-11 13:53:04 +03:00
compat.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
coredump.c
coredump: add %i/%I in core_pattern to report the tid of the crashed thread
2014-10-14 02:18:21 +02:00
dcache.c
Merge branch 'iov_iter' into for-next
2014-12-08 20:39:29 -05:00
dcookies.c
…
direct-io.c
fuse: honour max_read and max_write in direct_io mode
2014-09-26 21:16:51 -04:00
drop_caches.c
fs: convert use of typedef ctl_table to struct ctl_table
2014-06-06 16:08:16 -07:00
eventfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
eventpoll.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
exec.c
fs: Do not include mpx.h in exec.c
2014-11-18 02:01:40 +01:00
fcntl.c
security: make security_file_set_fowner, f_setown and __f_setown void return
2014-09-09 16:01:36 -04:00
fhandle.c
…
file_table.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-10-13 11:28:42 +02:00
file.c
fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0)
2014-12-10 17:41:10 -08:00
filesystems.c
…
fs_pin.c
make fs/{namespace,super}.c forget about acct.h
2014-08-07 14:40:09 -04:00
fs_struct.c
…
fs-writeback.c
sched: Remove proliferation of wait_on_bit() action functions
2014-07-16 15:10:39 +02:00
inode.c
mm: convert i_mmap_mutex to rwsem
2014-12-13 12:42:45 -08:00
internal.h
vfs: export __inode_permission() to modules
2014-10-24 00:14:35 +02:00
ioctl.c
fs: add freeze_super/thaw_super fs hooks
2014-11-17 10:35:17 +00:00
Kconfig
overlay filesystem
2014-10-24 00:14:38 +02:00
Kconfig.binfmt
binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers
2014-11-24 07:45:02 +01:00
libfs.c
move d_rcu from overlapping d_child to overlapping d_alias
2014-11-03 15:20:29 -05:00
locks.c
locks: flock_make_lock should return a struct file_lock (or PTR_ERR)
2014-10-07 14:06:13 -04:00
Makefile
ovl: rename filesystem type to "overlay"
2014-11-20 16:39:59 +01:00
mbcache.c
fs/mbcache: replace __builtin_log2() with ilog2()
2014-06-25 22:08:29 -04:00
mount.h
vfs: Add a function to lazily unmount all mounts from any dentry.
2014-10-09 02:38:55 -04:00
mpage.c
vfs: guard end of device for mpage interface
2014-10-09 22:25:53 -04:00
namei.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-11-02 10:28:43 -08:00
namespace.c
vfs: introduce clone_private_mount()
2014-10-24 00:14:36 +02:00
no-block.c
…
open.c
new helper: audit_file()
2014-11-19 13:01:26 -05:00
pipe.c
…
pnode.c
get rid of propagate_umount() mistakenly treating slaves as busy.
2014-08-30 18:31:41 -04:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
namespaces: Use task_lock and not rcu to protect nsproxy
2014-07-29 18:08:50 -07:00
read_write.c
cachefiles_write_page(): switch to __kernel_write()
2014-10-09 02:39:05 -04:00
readdir.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
select.c
…
seq_file.c
seq_file: Rename seq_overflow() to seq_has_overflowed() and make public
2014-10-29 20:26:06 -04:00
signalfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
splice.c
vfs: export do_splice_direct() to modules
2014-10-24 00:14:35 +02:00
stack.c
fs: fix comment for 'CONFIG_LBADF'
2014-08-26 09:35:56 +02:00
stat.c
…
statfs.c
…
super.c
vfs: Remove i_dquot field from inode
2014-11-10 10:06:18 +01:00
sync.c
kill f_dentry uses
2014-11-19 13:01:25 -05:00
timerfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
utimes.c
…
xattr.c
new helper: audit_file()
2014-11-19 13:01:26 -05:00