Christoph Lameter eebd2aa355 Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user ... Simplify page cache zeroing of segments of pages through 3 functions zero_user_segments(page, start1, end1, start2, end2) Zeros two segments of the page. It takes the position where to start and end the zeroing which avoids length calculations and makes code clearer. zero_user_segment(page, start, end) Same for a single segment. zero_user(page, start, length) Length variant for the case where we know the length. We remove the zero_user_page macro. Issues: 1. Its a macro. Inline functions are preferable. 2. The KM_USER0 macro is only defined for HIGHMEM. Having to treat this special case everywhere makes the code needlessly complex. The parameter for zeroing is always KM_USER0 except in one single case that we open code. Avoiding KM_USER0 makes a lot of code not having to be dealing with the special casing for HIGHMEM anymore. Dealing with kmap is only necessary for HIGHMEM configurations. In those configurations we use KM_USER0 like we do for a series of other functions defined in highmem.h. Since KM_USER0 is depends on HIGHMEM the existing zero_user_page function could not be a macro. zero_user_* functions introduced here can be be inline because that constant is not used when these functions are called. Also extract the flushing of the caches to be outside of the kmap. [akpm@linux-foundation.org: fix nfs and ntfs build] [akpm@linux-foundation.org: fix ntfs build some more] Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Steven French <sfrench@us.ibm.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Mark Fasheh <mark.fasheh@oracle.com> Cc: David Chinner <dgc@sgi.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Steven French <sfrench@us.ibm.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-05 09:44:13 -08:00
..
9p	9p: use copy of the options value instead of original	2007-11-06 08:02:53 -06:00
adfs	Slab API: remove useless ctor parameter and reorder parameters	2007-10-17 08:42:45 -07:00
affs	fs: mark nibblemap const	2007-10-17 08:42:47 -07:00
afs	vfs: Add 64 bit i_version support	2008-01-28 23:58:27 -05:00
autofs	Use task_pid_nr() instead of pid_nr(task_pid())	2007-10-19 11:53:43 -07:00
autofs4	pid namespaces: round up the API	2007-10-19 11:53:37 -07:00
befs	fs/: Spelling fixes	2008-02-03 17:33:42 +02:00
bfs	regression: bfs endianness bug	2007-12-05 09:25:20 -08:00
cifs	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
coda	coda: convert struct class_device to struct device	2008-01-24 20:40:05 -08:00
configfs	configfs: file.c fix possible recursive locking	2008-01-25 15:05:47 -08:00
cramfs	fs/cramfs/inode.c: replace hardcoded value with preprocessor constant	2007-10-18 14:37:29 -07:00
debugfs	Kobject: convert fs/* from kobject_unregister() to kobject_put()	2008-01-24 20:40:40 -08:00
devpts
dlm	dlm: static initialization improvements	2008-01-30 11:04:43 -06:00
ecryptfs	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
efs	exportfs: make struct export_operations const	2007-10-22 08:13:21 -07:00
exportfs	exportfs: update documentation	2007-10-22 08:13:21 -07:00
ext2	ext2: Fix the max file size for ext2 file system.	2008-01-28 23:58:26 -05:00
ext3	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
ext4	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
fat	fat: optimize fat_count_free_clusters()	2008-01-08 16:10:35 -08:00
freevxfs	fs/: Spelling fixes	2008-02-03 17:33:42 +02:00
fuse	Kobject: convert fs/* from kobject_unregister() to kobject_put()	2008-01-24 20:40:40 -08:00
gfs2	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
hfs	hfs: fix coverity-found null deref	2008-01-17 15:38:58 -08:00
hfsplus	Slab API: remove useless ctor parameter and reorder parameters	2007-10-17 08:42:45 -07:00
hostfs	uml: fix hostfs style	2007-10-16 09:43:07 -07:00
hpfs	Slab API: remove useless ctor parameter and reorder parameters	2007-10-17 08:42:45 -07:00
hppfs
hugetlbfs	hugetlb: allow bulk updating in hugetlb_*_quota()	2007-11-14 18:45:40 -08:00
isofs	exportfs: make struct export_operations const	2007-10-22 08:13:21 -07:00
jbd	spinlock: lockbreak cleanup	2008-01-30 13:31:20 +01:00
jbd2	spinlock: lockbreak cleanup	2008-01-30 13:31:20 +01:00
jffs2	Typoes: "whith" -> "with"	2008-02-03 15:14:02 +02:00
jfs	Spelling fixes: lenght->length	2008-02-03 15:42:53 +02:00
lockd	NLM: tear down RPC clients in nlm_shutdown_hosts	2008-02-01 16:42:15 -05:00
minix	limit minixfs printks on corrupted dir i_size	2007-10-17 08:42:53 -07:00
msdos
ncpfs	vm audit: add VM_DONTEXPAND to mmap for drivers that need it	2008-02-04 07:55:38 -08:00
nfs	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
nfs_common
nfsd	nfsd: more careful input validation in nfsctl write methods	2008-02-01 16:42:15 -05:00
nls	sparse pointer use of zero as null	2007-10-18 14:37:31 -07:00
ntfs	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
ocfs2	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
openpromfs	[SPARC]: Constify function pointer tables.	2008-01-22 18:29:20 -08:00
partitions	Kobject: convert fs/* from kobject_unregister() to kobject_put()	2008-01-24 20:40:40 -08:00
proc	[PATCH] switch audit_get_loginuid() to task_struct *	2008-02-01 14:04:59 -05:00
qnx4	Slab API: remove useless ctor parameter and reorder parameters	2007-10-17 08:42:45 -07:00
ramfs	Remove valueless definition of hard-selected RAMFS option	2007-10-17 08:42:56 -07:00
reiserfs	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
romfs	fs/romfs/inode.c: trivial improvements	2007-10-17 08:42:47 -07:00
smbfs	Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc	2008-02-01 11:45:47 +11:00
sysfs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2008-01-25 17:19:08 -08:00
sysv	Slab API: remove useless ctor parameter and reorder parameters	2007-10-17 08:42:45 -07:00
udf	fs/udf/balloc.c: mark a variable as uninitialized_var()	2007-10-17 08:43:00 -07:00
ufs	ufs: fix nexstep dir block size	2007-12-05 09:21:18 -08:00
vfat
xfs	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
aio.c	core: remove last users of empty FASTCALL macro	2008-01-30 13:31:17 +01:00
anon_inodes.c	anon-inodes use open coded atomic_inc for the shared inode	2007-10-17 08:43:00 -07:00
attr.c	VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations	2007-10-18 14:37:22 -07:00
bad_inode.c
binfmt_aout.c	mm: fix exit_mmap BUG() on a.out binary exit	2007-12-20 07:49:53 -08:00
binfmt_elf.c	fs/binfmt_elf.c: spello fix	2008-02-03 18:05:15 +02:00
binfmt_elf_fdpic.c	pid namespaces: changes to show virtual ids to user	2007-10-19 11:53:40 -07:00
binfmt_em86.c	Convert files to UTF-8 and some cleanups	2007-10-19 23:21:04 +02:00
binfmt_flat.c	binfmt_flat: warning fixes	2007-10-17 08:42:54 -07:00
binfmt_misc.c	Convert files to UTF-8 and some cleanups	2007-10-19 23:21:04 +02:00
binfmt_script.c	Convert files to UTF-8 and some cleanups	2007-10-19 23:21:04 +02:00
binfmt_som.c	core_pattern: ignore RLIMIT_CORE if core_pattern is a pipe	2007-10-17 08:42:50 -07:00
bio.c	__bio_clone: don't calculate hw/phys segment counts	2008-01-28 10:04:46 +01:00
block_dev.c	Driver core: convert block from raw kobjects to core devices	2008-01-24 20:40:36 -08:00
buffer.c	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
char_dev.c	Kobject: rename kobject_init_ng() to kobject_init()	2008-01-24 20:40:38 -08:00
compat.c	timerfd: new timerfd API	2008-02-05 09:44:07 -08:00
compat_binfmt_elf.c	x86: compat_binfmt_elf	2008-01-30 13:31:46 +01:00
compat_ioctl.c	remove __attribute_used__	2008-01-28 23:21:18 +01:00
dcache.c	dcache: don't expose uninitialized memory in /proc/<pid>/fd/<fd>	2007-10-22 08:13:18 -07:00
dcookies.c	Remove fs.h from mm.h	2007-07-29 17:09:29 -07:00
direct-io.c	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
dnotify.c	mm: Remove slab destructors from kmem_cache_create().	2007-07-20 10:11:58 +09:00
dquot.c	Don't send quota messages repeatedly when hardlimit reached	2007-12-23 12:54:36 -08:00
drop_caches.c
eventfd.c
eventpoll.c	lockdep: annotate epoll	2008-02-05 09:44:07 -08:00
exec.c	exec: rework the group exit and fix the race with kill	2008-02-05 09:44:07 -08:00
fcntl.c	pid namespaces: changes to show virtual ids to user	2007-10-19 11:53:40 -07:00
fifo.c
file.c
file_table.c	fs/file_table.c: use list_for_each_entry() instead of list_for_each()	2007-10-19 11:53:38 -07:00
filesystems.c
fs-writeback.c	Revert "writeback: introduce writeback_control.more_io to indicate more io"	2008-01-14 21:21:29 -08:00
generic_acl.c	Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check	2007-07-17 12:00:03 -07:00
inode.c	ext4: Add inode version support in ext4	2008-01-28 23:58:27 -05:00
inotify.c	[PATCH] new helper - inotify_evict_watch()	2007-10-21 02:37:38 -04:00
inotify_user.c	change inotifyfs magic as the same magic is used for futexfs	2007-10-17 08:43:00 -07:00
internal.h
ioctl.c
ioprio.c	cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions	2008-01-28 11:38:15 +01:00
Kconfig	nfsd: select CONFIG_PROC_FS in nfsv4 and gss server cases	2008-02-01 16:42:04 -05:00
Kconfig.binfmt	x86: compat_binfmt_elf Kconfig	2008-01-30 13:31:46 +01:00
libfs.c	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
locks.c	pid-namespaces-vs-locks-interaction	2008-02-03 17:51:36 -05:00
Makefile	x86: compat_binfmt_elf Kconfig	2008-01-30 13:31:46 +01:00
mbcache.c	fs: Fix to correct the mbcache entries counter	2007-10-25 15:18:29 -07:00
mpage.c	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
namei.c	Use access mode instead of open flags to determine needed permissions	2008-01-12 14:47:58 -08:00
namespace.c	kobject: convert main fs kobject to use kobject_create	2008-01-24 20:40:13 -08:00
nfsctl.c	nfsctl: use vfs_path_lookup	2007-07-19 10:04:45 -07:00
no-block.c
open.c	mark sys_open/sys_read exports unused	2007-11-14 18:45:42 -08:00
pipe.c	sched: affine sync wakeups	2007-10-15 17:00:19 +02:00
pnode.c
pnode.h	[PATCH] new helpers - collect_mounts() and release_collected_mounts()	2007-10-21 02:37:25 -04:00
posix_acl.c
quota.c	[IA64] Fix build failure in fs/quota.c	2007-07-27 15:40:13 -07:00
quota_v1.c
quota_v2.c
read_write.c	ext4: export iov_shorten from kernel for ext4's use	2008-01-28 23:58:27 -05:00
read_write.h
readdir.c	Use mutex_lock_killable in vfs_readdir	2007-12-06 17:39:54 -05:00
select.c	fs/select, remove unused macros	2007-10-19 11:53:41 -07:00
seq_file.c	[FS] seq_file: Introduce the seq_open_private()	2007-10-10 16:55:33 -07:00
signalfd.c	Fix a small number of "memeber" typoes.	2008-02-03 15:12:15 +02:00
splice.c	splice: always updated atime in direct splice	2008-02-01 09:26:32 +01:00
stack.c
stat.c
super.c	Convert files to UTF-8 and some cleanups	2007-10-19 23:21:04 +02:00
sync.c
timerfd.c	timerfd: new timerfd API	2008-02-05 09:44:07 -08:00
utimes.c	VFS: check nanoseconds in utimensat	2007-10-17 08:42:52 -07:00
xattr.c	[PATCH] pass dentry to audit_inode()/audit_inode_child()	2007-10-21 02:37:18 -04:00
xattr_acl.c