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Alexey Dobriyan d5a572a4cb proc: calculate end pointer for /proc/*/* lookup at compile time 
Compilers like to transform loops like

	for (i = 0; i < n; i++) {
		[use p[i]]
	}

into
	for (p = p0; p < end; p++) {
		...
	}

Do it by hand, so that it results in overall simpler loop
and smaller code.

Space savings:

	$ ./scripts/bloat-o-meter ../vmlinux-001 ../obj/vmlinux
	add/remove: 0/0 grow/shrink: 2/1 up/down: 4/-9 (-5)
	Function                                     old     new   delta
	proc_tid_base_lookup                          17      19      +2
	proc_tgid_base_lookup                         17      19      +2
	proc_pident_lookup                           179     170      -9

The same could be done to proc_pident_readdir(), but the code becomes
bigger for some reason.

[sfr@canb.auug.org.au: merge fix for proc_pident_lookup() API change]
  Link: http://lkml.kernel.org/r/20190131160135.4a8ae70b@canb.auug.org.au
Link: http://lkml.kernel.org/r/20190114200422.GB9680@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: James Morris <jmorris@namei.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-12 10:04:01 -07:00
..
9p
mm: refactor readahead defines in mm.h
2019-03-12 10:04:01 -07:00
adfs
adfs: use timespec64 for time conversion
2018-08-22 10:52:51 -07:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
mm: refactor readahead defines in mm.h
2019-03-12 10:04:01 -07:00
autofs
autofs: clear O_NONBLOCK on the pipe
2019-03-07 18:32:01 -08:00
befs
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
bfs
bfs: extra sanity checking and static inode bitmap
2019-01-04 13:13:47 -08:00
btrfs
mm: refactor readahead defines in mm.h
2019-03-12 10:04:01 -07:00
cachefiles
fscache, cachefiles: remove redundant variable 'cache'
2018-11-30 16:00:58 +00:00
ceph
ceph: avoid repeatedly adding inode to mdsc->snap_flush_list
2019-02-18 18:08:29 +01:00
cifs
fs: cifs: Kconfig: pedantic formatting
2019-03-06 21:55:12 -06:00
coda
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
configfs
configfs: fix registered group removal
2018-07-17 06:14:07 -07:00
cramfs
Make the Cramfs code more robust against filesystem corruptions,
2018-10-30 12:46:25 -07:00
crypto
fscrypt updates for v5.1
2019-03-09 10:54:24 -08:00
debugfs
Merge 5.0-rc6 into driver-core-next
2019-02-11 09:09:02 +01:00
devpts
devpts: Convert to new IDA API
2018-08-21 23:54:17 -04:00
dlm
socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes
2019-02-03 11:17:31 -08:00
ecryptfs
crypto: clarify name of WEAK_KEY request flag
2019-01-25 18:41:52 +08:00
efivarfs
efivars: Call guid_parse() against guid_t type of variable
2018-07-22 14:13:44 +02:00
efs
…
exportfs
exportfs: do not read dentry after free
2018-11-23 09:08:17 -05:00
ext2
\n
2019-03-07 09:01:33 -08:00
ext4
fscrypt updates for v5.1
2019-03-09 10:54:24 -08:00
f2fs
fscrypt updates for v5.1
2019-03-09 10:54:24 -08:00
fat
fat: enable .splice_write to support splice on O_DIRECT file
2019-03-07 18:32:01 -08:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
fscache: fix race between enablement and dropping of object
2018-11-30 15:57:31 +00:00
fuse
mm: refactor readahead defines in mm.h
2019-03-12 10:04:01 -07:00
gfs2
We've only got three patches ready for this merge window:
2019-03-09 11:52:11 -08:00
hfs
hfs: do not free node before using
2018-11-30 14:56:14 -08:00
hfsplus
hfsplus: return file attributes on statx
2019-01-04 13:13:47 -08:00
hostfs
vfs: discard ATTR_ATTR_FLAG
2018-08-17 16:20:28 -07:00
hpfs
hpfs: remove unnecessary checks on the value of r when assigning error code
2018-08-25 12:42:33 -07:00
hugetlbfs
mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd
2019-03-05 21:07:19 -08:00
isofs
Update email address
2018-09-29 22:47:48 -04:00
jbd2
jbd2: clean up indentation issue, replace spaces with tab
2018-12-04 00:20:10 -05:00
jffs2
jffs2: Fix use of uninitialized delayed_work, lockdep breakage
2018-12-02 09:20:34 +01:00
jfs
jfs: remove redundant dquot_initialize() in jfs_evict_inode()
2018-09-20 09:28:49 -05:00
kernfs
Driver core patches for 5.1-rc1
2019-03-06 14:52:48 -08:00
lockd
NFS client updates for Linux 4.21
2019-01-02 16:35:23 -08:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
Merge branch 'fixes-v5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-02-20 09:09:33 -08:00
nfs_common
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
nfsd
Revert "nfsd4: return default lease period"
2019-02-14 12:33:19 -05:00
nilfs2
nilfs2: Use xa_erase_irq
2018-11-05 14:57:05 -05:00
nls
…
notify
fanotify: Make waits for fanotify events only killable
2019-02-21 11:47:23 +01:00
ntfs
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
ocfs2
ocfs2: Use zero-sized array and struct_size() in kzalloc()
2019-03-05 21:07:13 -08:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
fs/openpromfs: Use of_node_name_eq for node name comparisons
2018-11-18 13:35:19 -08:00
orangefs
orangefs: remove two un-needed BUG_ONs...
2019-02-20 15:12:52 -05:00
overlayfs
Revert "ovl: relax permission checking on underlying layers"
2018-12-04 11:31:30 +01:00
proc
proc: calculate end pointer for /proc/*/* lookup at compile time
2019-03-12 10:04:01 -07:00
pstore
pstore/ram: Avoid needless alloc during header write
2019-02-12 13:45:53 -08:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls.
2018-12-18 18:29:15 +01:00
ramfs
…
reiserfs
reiserfs: remove workaround code for GCC 3.x
2018-10-31 08:54:14 -07:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-08-02 09:34:02 -07:00
sysfs
sysfs: remove unused include of kernfs-internal.h
2019-02-08 12:57:31 +01:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-11-10 08:02:40 -05:00
tracefs
tracefs: Annotate tracefs_ops with __ro_after_init
2018-07-31 11:32:44 -04:00
ubifs
fscrypt: remove filesystem specific build config option
2019-01-23 23:56:43 -05:00
udf
udf: Drop pointless check from udf_sync_fs()
2019-02-21 19:25:36 +01:00
ufs
fs/ufs: use ktime_get_real_seconds for sb and cg timestamps
2018-08-17 16:20:27 -07:00
xfs
for-5.1/block-20190302
2019-03-08 14:12:17 -08:00
aio.c
Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-03-05 14:08:26 -08:00
anon_inodes.c
anon_inode_getfile(): switch to alloc_file_pseudo()
2018-07-12 10:04:27 -04:00
attr.c
fs: Fix attr.c kernel-doc
2018-07-03 16:44:45 -04:00
bad_inode.c
get rid of 'opened' argument of ->atomic_open() - part 3
2018-07-12 10:04:20 -04:00
binfmt_aout.c
a.out: remove core dumping support
2019-03-05 10:00:35 -08:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
fs/binfmt_elf.c: spread const a little
2019-03-07 18:32:01 -08:00
binfmt_em86.c
…
binfmt_flat.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_misc.c
turn filp_clone_open() into inline wrapper for dentry_open()
2018-07-10 23:29:03 -04:00
binfmt_script.c
exec: load_script: Do not exec truncated interpreter path
2019-02-18 16:49:36 -08:00
block_dev.c
block: add bio_set_polled() helper
2019-02-24 08:20:17 -07:00
buffer.c
fs: fix guard_bio_eod to check for real EOD errors
2019-02-28 13:59:41 -07:00
char_dev.c
block, char_dev: Use correct format specifier for unsigned ints
2018-03-15 17:59:24 +01:00
compat_binfmt_elf.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
compat_ioctl.c
media updates for v4.20-rc1
2018-10-29 14:29:58 -07:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
d_path.c
split d_path() and friends into a separate file
2018-03-29 15:07:46 -04:00
dax.c
dax fix 4.21
2018-12-31 09:46:39 -08:00
dcache.c
fs/dcache: Track & report number of negative dentries
2019-01-30 11:02:11 -08:00
dcookies.c
fs: add do_lookup_dcookie() helper; remove in-kernel call to syscall
2018-04-02 20:15:39 +02:00
direct-io.c
block: allow bio_for_each_segment_all() to iterate over multi-page bvec
2019-02-15 08:40:11 -07:00
drop_caches.c
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
2019-02-01 15:46:24 -08:00
eventfd.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
eventpoll.c
epoll: use rwlock in order to reduce ep_poll_callback() contention
2019-03-07 18:32:01 -08:00
exec.c
exec: increase BINPRM_BUF_SIZE to 256
2019-03-07 18:32:01 -08:00
fcntl.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
fhandle.c
…
file_table.c
fs: add fget_many() and fput_many()
2019-02-28 08:24:23 -07:00
file.c
io_uring-2019-03-06
2019-03-08 14:48:40 -08:00
filesystems.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs_pin.c
…
fs_struct.c
…
fs_types.c
fs: common implementation of file type
2019-01-21 17:48:13 +01:00
fs-writeback.c
writeback: synchronize sync(2) against cgroup writeback membership switches
2019-01-22 14:39:38 -07:00
inode.c
fs/inode.c: inode_set_flags(): replace opencoded set_mask_bits()
2019-03-05 21:07:13 -08:00
internal.h
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
io_uring.c
mm: refactor readahead defines in mm.h
2019-03-12 10:04:01 -07:00
ioctl.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
iomap.c
iomap: wire up the iopoll method
2019-02-24 08:20:17 -07:00
Kconfig
scsi: fs: remove exofs
2019-02-05 21:28:13 -05:00
Kconfig.binfmt
kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
2018-08-02 08:06:55 +09:00
libfs.c
fs, dax: prepare for dax-specific address_space_operations
2018-03-30 11:34:55 -07:00
locks.c
locking/percpu-rwsem: Remove preempt_disable variants
2019-02-28 07:55:37 +01:00
Makefile
SCSI misc on 20190306
2019-03-09 16:53:47 -08:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
block: allow bio_for_each_segment_all() to iterate over multi-page bvec
2019-02-15 08:40:11 -07:00
namei.c
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-03-10 17:32:04 -07:00
namespace.c
audit/stable-5.1 PR 20190305
2019-03-07 12:20:11 -08:00
no-block.c
…
nsfs.c
…
open.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
pipe.c
memcg: localize memcg_kmem_enabled() check
2019-03-05 21:07:15 -08:00
pnode.c
vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled
2018-12-20 16:32:56 +00:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
get rid of legacy 'get_ds()' function
2019-03-04 10:50:14 -08:00
readdir.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
select.c
y2038: syscalls: rename y2038 compat syscalls
2019-02-07 00:13:27 +01:00
seq_file.c
fs/seq_file.c: simplify seq_file iteration code and interface
2018-08-17 16:20:28 -07:00
signalfd.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
splice.c
fs: Make splice() and tee() take into account O_NONBLOCK flag on pipes
2019-03-04 16:10:17 -08:00
stack.c
…
stat.c
y2038: Remove newstat family from default syscall set
2018-08-29 15:42:20 +02:00
statfs.c
vfs: add vfs_get_fsid() helper
2019-02-07 16:38:35 +01:00
super.c
mount_fs: suppress MAC on MS_SUBMOUNT as well as MS_KERNMOUNT
2018-12-21 11:51:23 -05:00
sync.c
Changes for this release:
2018-04-04 12:44:02 -07:00
timerfd.c
y2038: syscalls: rename y2038 compat syscalls
2019-02-07 00:13:27 +01:00
userfaultfd.c
userfaultfd: clear flag if remap event not enabled
2018-12-28 12:11:51 -08:00
utimes.c
y2038: syscalls: rename y2038 compat syscalls
2019-02-07 00:13:27 +01:00
xattr.c
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-09-18 07:30:48 -04:00