KOSAKI Motohiro 3d3727cdb0 mm, fadvise: don't return -EINVAL when filesystem cannot implement fadvise() ... Eric Wong reported his test suite failex when /tmp is tmpfs. https://lkml.org/lkml/2012/2/24/479 Currentlt the input check of POSIX_FADV_WILLNEED has two problems. - requires a_ops->readpage. But in fact, force_page_cache_readahead() requires that the target filesystem has either ->readpage or ->readpages. - returns -EINVAL when the filesystem doesn't have ->readpage. But posix says that fadvise is merely a hint. Thus fadvise() should return 0 if filesystem has no means of implementing fadvise(). The userland application should not know nor care whcih type of filesystem backs the TMPDIR directory, as Eric pointed out. There is nothing which userspace can do to solve this error. So change the return value to 0 when filesytem doesn't support readahead. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Cc: Hillf Danton <dhillf@gmail.com> Signed-off-by: Eric Wong <normalperson@yhbt.net> Tested-by: Eric Wong <normalperson@yhbt.net> Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-07-31 18:42:42 -07:00
..
backing-dev.c	mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads	2012-07-31 18:42:40 -07:00
bootmem.c	bootmem: make ___alloc_bootmem_node_nopanic() really nopanic	2012-07-17 16:21:29 -07:00
bounce.c	bounce: allow use of bounce pool via config option	2012-07-18 16:40:35 -04:00
cleancache.c	->encode_fh() API change	2012-05-29 23:28:33 -04:00
compaction.c	mm, thp: abort compaction if migration page cannot be charged to memcg	2012-07-11 16:04:43 -07:00
debug-pagealloc.c
dmapool.c
fadvise.c	mm, fadvise: don't return -EINVAL when filesystem cannot implement fadvise()	2012-07-31 18:42:42 -07:00
failslab.c
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-06-01 10:34:35 -07:00
filemap_xip.c	fs: introduce inode operation ->update_time	2012-06-01 12:07:25 -04:00
fremap.c
frontswap.c	mm/frontswap: cleanup doc and comment error	2012-07-23 11:16:20 -04:00
highmem.c
huge_memory.c	mm/memcg: apply add/del_page to lruvec	2012-05-29 16:22:28 -07:00
hugetlb.c	hugetlb/cgroup: assign the page hugetlb cgroup when we move the page to active list.	2012-07-31 18:42:41 -07:00
hugetlb_cgroup.c	hugetlb/cgroup: remove exclude and wakeup rmdir calls from migrate	2012-07-31 18:42:41 -07:00
hwpoison-inject.c
init-mm.c
internal.h	Revert "mm: compaction: handle incorrect MIGRATE_UNMOVABLE type pageblocks"	2012-06-03 20:05:57 -07:00
Kconfig	Frontswap provides a "transcendent memory" interface for swap pages.	2012-06-04 12:28:45 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c
maccess.c
madvise.c	mm: Hold a file reference in madvise_remove	2012-07-06 10:34:38 -07:00
Makefile	mm/hugetlb: add new HugeTLB cgroup	2012-07-31 18:42:40 -07:00
memblock.c	mm/memblock.c:memblock_double_array(): cosmetic cleanups	2012-07-31 18:42:41 -07:00
memcontrol.c	memcg: make mem_cgroup_force_empty_list() return bool	2012-07-31 18:42:42 -07:00
memory-failure.c	hugetlb: simplify migrate_huge_page()	2012-07-31 18:42:40 -07:00
memory.c	hugetlb: use mmu_gather instead of a temporary linked list for accumulating pages	2012-07-31 18:42:40 -07:00
memory_hotplug.c	mm/memory_hotplug.c: release memory resources if hotadd_new_pgdat() fails	2012-07-11 16:04:46 -07:00
mempolicy.c	Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux	2012-07-30 11:32:24 -07:00
mempool.c
migrate.c	hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration	2012-07-31 18:42:41 -07:00
mincore.c
mlock.c
mm_init.c
mmap.c	mm: account the total_vm in the vm_stat_account()	2012-07-31 18:42:39 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c	mm: add link from struct lruvec to struct zone	2012-05-29 16:22:26 -07:00
mprotect.c
mremap.c	mm: account the total_vm in the vm_stat_account()	2012-07-31 18:42:39 -07:00
msync.c
nobootmem.c	memblock: free allocated memblock_reserved_regions later	2012-07-11 16:04:50 -07:00
nommu.c	nommu: fix compilation of nommu.c	2012-06-04 17:17:31 -04:00
oom_kill.c	mm, oom: do not schedule if current has been killed	2012-07-31 18:42:41 -07:00
page-writeback.c	writeback: Fix some comment errors	2012-06-09 19:54:47 +08:00
page_alloc.c	mm/buddy: cleanup on should_fail_alloc_page	2012-07-31 18:42:40 -07:00
page_cgroup.c	mm: fix kernel-doc warnings	2012-06-20 14:39:36 -07:00
page_io.c	frontswap: s/put_page/store/g s/get_page/load	2012-05-15 11:34:08 -04:00
page_isolation.c	mm: page_isolation: MIGRATE_CMA isolation functions added	2012-05-21 15:09:33 +02:00
pagewalk.c	mm: fix kernel-doc warnings	2012-06-20 14:39:36 -07:00
percpu-km.c
percpu-vm.c	mm: fix kernel-doc warnings	2012-06-20 14:39:36 -07:00
percpu.c	kmemleak: Fix the kmemleak tracking of the percpu areas with !SMP	2012-05-09 10:13:29 -07:00
pgtable-generic.c	arch/tile: allow building Linux with transparent huge pages enabled	2012-05-25 12:48:21 -04:00
prio_tree.c
process_vm_access.c	aio/vfs: cleanup of rw_copy_check_uvector() and compat_rw_copy_check_uvector()	2012-05-31 17:49:32 -07:00
quicklist.c
readahead.c	mm: move readahead syscall to mm/readahead.c	2012-05-29 16:22:23 -07:00
rmap.c	mm: remove swap token code	2012-05-29 16:22:19 -07:00
shmem.c	don't pass nameidata to ->create()	2012-07-14 16:34:47 +04:00
slab.c	mm, sl[aou]b: Move kmem_cache_create mutex handling to common code	2012-07-09 12:13:42 +03:00
slab.h	mm, sl[aou]b: Use a common mutex definition	2012-07-09 12:13:41 +03:00
slab_common.c	mm: Fix build warning in kmem_cache_create()	2012-07-30 13:15:40 +03:00
slob.c	slob: Fix early boot kernel crash	2012-07-12 10:13:22 +03:00
slub.c	mm, slub: ensure irqs are enabled for kmemcheck	2012-07-10 22:43:52 +03:00
sparse-vmemmap.c
sparse.c	mm: sparse: fix usemap allocation above node descriptor section	2012-07-11 16:04:49 -07:00
swap.c	mm/memcg: apply add/del_page to lruvec	2012-05-29 16:22:28 -07:00
swap_state.c	swap: allow swap readahead to be merged	2012-07-31 18:42:39 -07:00
swapfile.c	swap: fix shmem swapping when more than 8 areas	2012-06-15 21:48:14 -07:00
truncate.c	mm/fs: remove truncate_range	2012-05-29 16:22:23 -07:00
util.c	new helper: vm_mmap_pgoff()	2012-06-01 10:37:18 -04:00
vmalloc.c	mm: make vb_alloc() more foolproof	2012-07-31 18:42:39 -07:00
vmscan.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-07-24 13:34:56 -07:00
vmstat.c	mm/vmstat.c: remove debug fs entries on failure of file creation and made extfrag_debug_root dentry local	2012-05-29 16:22:19 -07:00