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Hugh Dickins d15cab9754 swapon: check validity of swap_flags 
Most system calls taking flags first check that the flags passed in are
valid, and that helps userspace to detect when new flags are supported.

But swapon never did so: start checking now, to help if we ever want to
support more swap_flags in future.

It's difficult to get stray bits set in an int, and swapon is not widely
used, so this is most unlikely to break any userspace; but we can just
revert if it turns out to do so.

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
..
backing-dev.c
backing-dev: fix wakeup timer races with bdi_unregister()
2012-02-01 16:52:49 +08:00
bootmem.c
bootmem/sparsemem: remove limit constraint in alloc_bootmem_section
2012-03-21 17:54:58 -07:00
bounce.c
mm: remove the second argument of k[un]map_atomic()
2012-03-20 21:48:27 +08:00
cleancache.c
mm: cleancache: Use __read_mostly as appropiate.
2012-01-23 16:08:09 -05:00
compaction.c
mm: compaction: make compact_control order signed
2012-03-21 17:54:56 -07:00
debug-pagealloc.c
mm, x86: Remove debug_pagealloc_enabled
2011-12-06 09:24:07 +01:00
dmapool.c
mm: fix implicit stat.h usage in dmapool.c
2011-10-31 09:20:12 -04:00
fadvise.c
fadvise: only initiate writeback for specified range with FADV_DONTNEED
2012-01-10 16:30:43 -08:00
failslab.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
filemap_xip.c
mm/filemap_xip.c: fix race condition in xip_file_fault()
2012-02-03 16:16:41 -08:00
filemap.c
Cleanups: rename of flush to invalidate, moving reporting of statistics
2012-03-22 19:52:47 -07:00
fremap.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
highmem.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
huge_memory.c
thp: optimize away unnecessary page table locking
2012-03-21 17:54:57 -07:00
hugetlb.c
mm: hugetlb: cleanup duplicated code in unmapping vm range
2012-03-23 16:58:31 -07:00
hwpoison-inject.c
HWPOISON: Clean up memory_failure() vs. __memory_failure()
2012-01-03 12:06:32 -08:00
init-mm.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
internal.h
mm: thp: tail page refcounting fix
2011-11-02 16:06:57 -07:00
Kconfig
Merge branch 'master' into x86/memblock
2011-11-28 09:46:22 -08:00
Kconfig.debug
mm: more intensive memory corruption debugging
2012-01-10 16:30:42 -08:00
kmemcheck.c
kmemcheck: Fix build errors due to missing slab.h
2010-03-30 22:02:32 +09:00
kmemleak-test.c
kmemleak: remove memset by using kzalloc
2011-01-27 18:31:51 +00:00
kmemleak.c
kmemleak: Disable early logging when kmemleak is off by default
2012-01-20 16:57:05 +00:00
ksm.c
ksm: cleanup: introduce find_mergeable_vma()
2012-03-21 17:54:59 -07:00
maccess.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
madvise.c
coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP
2012-03-23 16:58:42 -07:00
Makefile
Cross Memory Attach
2011-10-31 17:30:44 -07:00
memblock.c
memblock: Fix size aligning of memblock_alloc_base_nid()
2012-03-01 10:53:18 +01:00
memcontrol.c
mm: thp: fix up pmd_trans_unstable() locations
2012-03-28 17:14:35 -07:00
memory_hotplug.c
mm: compaction: introduce sync-light migration for use by compaction
2012-01-12 20:13:09 -08:00
memory-failure.c
Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-22 09:42:04 -07:00
memory.c
coredump: remove VM_ALWAYSDUMP flag
2012-03-23 16:58:42 -07:00
mempolicy.c
cpuset: mm: reduce large amounts of memory barrier related damage v3
2012-03-21 17:54:59 -07:00
mempool.c
mempool: fix first round failure behavior
2012-01-10 16:30:45 -08:00
migrate.c
mm: fix move/migrate_pages() race on task struct
2012-03-21 17:54:58 -07:00
mincore.c
mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode
2012-03-21 17:54:54 -07:00
mlock.c
vm: avoid using find_vma_prev() unnecessarily
2012-03-06 18:23:36 -08:00
mm_init.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mmap.c
Merge branch 'akpm' (Andrew's patch-bomb)
2012-03-22 09:04:48 -07:00
mmu_context.c
mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()
2012-03-21 17:54:59 -07:00
mmu_notifier.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mmzone.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
mprotect.c
Merge branch 'akpm' (Andrew's patch-bomb)
2012-03-22 09:04:48 -07:00
mremap.c
mm: collapse security_vm_enough_memory() variants into a single function
2012-02-14 10:45:39 +11:00
msync.c
sanitize vfs_fsync calling conventions
2010-05-21 18:31:21 -04:00
nobootmem.c
Merge branch 'master' into x86/memblock
2011-11-28 09:46:22 -08:00
nommu.c
NOMMU: Don't need to clear vm_mm when deleting a VMA
2012-02-24 08:59:04 -08:00
oom_kill.c
signal: oom_kill_task: use SEND_SIG_FORCED instead of force_sig()
2012-03-23 16:58:41 -07:00
page_alloc.c
mm, coredump: fail allocations when coredumping instead of oom killing
2012-03-28 17:14:35 -07:00
page_cgroup.c
page_cgroup: fix horrid swap accounting regression
2012-03-06 08:18:23 -08:00
page_io.c
block: kill off REQ_UNPLUG
2011-03-10 08:52:27 +01:00
page_isolation.c
mm: page_isolation: codeclean fix comment and rm unneeded val init
2010-10-26 16:52:11 -07:00
page-writeback.c
Ext4 commits for 3.3 merge window; mostly cleanups and bug fixes
2012-03-28 10:02:55 -07:00
pagewalk.c
mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode
2012-03-21 17:54:54 -07:00
percpu-km.c
percpu: clear memory allocated with the km allocator
2010-10-02 10:28:42 +03:00
percpu-vm.c
percpu: use bitmap_clear
2012-01-20 09:23:16 -08:00
percpu.c
Kmemleak patches
2012-01-14 18:11:11 -08:00
pgtable-generic.c
thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE
2012-03-21 17:55:02 -07:00
prio_tree.c
sanitize <linux/prefetch.h> usage
2011-05-20 12:50:29 -07:00
process_vm_access.c
Fix race in process_vm_rw_core
2012-02-02 12:55:17 -08:00
quicklist.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
readahead.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
rmap.c
memcg: use new logic for page stat accounting
2012-03-21 17:55:01 -07:00
shmem.c
Merge branch 'akpm' (Andrew's patch-bomb)
2012-03-22 09:04:48 -07:00
slab.c
cpuset: mm: reduce large amounts of memory barrier related damage v3
2012-03-21 17:54:59 -07:00
slob.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
slub.c
cpuset: mm: reduce large amounts of memory barrier related damage v3
2012-03-21 17:54:59 -07:00
sparse-vmemmap.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
sparse.c
bootmem/sparsemem: remove limit constraint in alloc_bootmem_section
2012-03-21 17:54:58 -07:00
swap_state.c
mm: make swapin readahead skip over holes
2012-03-21 17:54:56 -07:00
swap.c
mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug
2012-03-21 17:54:58 -07:00
swapfile.c
swapon: check validity of swap_flags
2012-03-28 17:14:35 -07:00
thrash.c
mm/thrash.c: quiet sparse noise
2011-10-31 17:30:50 -07:00
truncate.c
mm for fs: add truncate_pagecache_range()
2012-03-28 17:14:35 -07:00
util.c
procfs: mark thread stack correctly in proc/<pid>/maps
2012-03-21 17:54:58 -07:00
vmalloc.c
mm: remove the second argument of k[un]map_atomic()
2012-03-20 21:48:27 +08:00
vmscan.c
Fix potential endless loop in kswapd when compaction is not enabled
2012-03-24 12:18:32 -07:00
vmstat.c
mm,x86,um: move CMPXCHG_LOCAL config option
2012-01-12 20:13:03 -08:00