Linus Torvalds a1fde08c74 VM: skip the stack guard page lookup in get_user_pages only for mlock ... The logic in __get_user_pages() used to skip the stack guard page lookup whenever the caller wasn't interested in seeing what the actual page was. But Michel Lespinasse points out that there are cases where we don't care about the physical page itself (so 'pages' may be NULL), but do want to make sure a page is mapped into the virtual address space. So using the existence of the "pages" array as an indication of whether to look up the guard page or not isn't actually so great, and we really should just use the FOLL_MLOCK bit. But because that bit was only set for the VM_LOCKED case (and not all vma's necessarily have it, even for mlock()), we couldn't do that originally. Fix that by moving the VM_LOCKED check deeper into the call-chain, which actually simplifies many things. Now mlock() gets simpler, and we can also check for FOLL_MLOCK in __get_user_pages() and the code ends up much more straightforward. Reported-and-reviewed-by: Michel Lespinasse <walken@google.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-05-04 21:30:28 -07:00
..
backing-dev.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
bootmem.c	crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn	2011-03-23 19:47:19 -07:00
bounce.c	bounce: call flush_dcache_page() after bounce_copy_vec()	2010-09-09 18:57:25 -07:00
compaction.c	mm: compaction: minimise the time IRQs are disabled while isolating pages for migration	2011-03-22 17:44:05 -07:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()	2011-01-13 17:32:48 -08:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap_xip.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-03-24 19:01:30 -07:00
fremap.c	Avoid pgoff overflow in remap_file_pages	2010-09-25 09:34:58 -07:00
highmem.c	mm,x86: fix kmap_atomic_push vs ioremap_32.c	2010-10-27 18:03:05 -07:00
huge_memory.c	mm: thp: fix /dev/zero MAP_PRIVATE and vm_flags cleanups	2011-04-28 11:28:20 -07:00
hugetlb.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
hwpoison-inject.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
init-mm.c	mm: provide init_mm mm_context initializer	2010-08-09 20:44:54 -07:00
internal.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
Kconfig	mm: compaction: don't depend on HUGETLB_PAGE	2011-01-26 10:50:02 +10:00
Kconfig.debug	mm: debug-pagealloc: fix kconfig dependency warning	2011-03-22 17:44:02 -07:00
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	Fix common misspellings	2011-03-31 11:26:23 -03:00
ksm.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
maccess.c	MN10300: Save frame pointer in thread_info struct rather than global var	2010-10-27 17:29:01 +01:00
madvise.c	thp: khugepaged: make khugepaged aware about madvise	2011-01-13 17:32:47 -08:00
Makefile	bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c	2011-02-24 14:43:05 +01:00
memblock.c	mm/memblock: properly handle overlaps and fix error path	2011-03-22 17:44:09 -07:00
memcontrol.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
memory_hotplug.c	mm: optimize pfn calculation in online_page()	2011-04-14 16:06:54 -07:00
memory-failure.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
memory.c	VM: skip the stack guard page lookup in get_user_pages only for mlock	2011-05-04 21:30:28 -07:00
mempolicy.c	mempolicy: remove redundant check in __mpol_equal()	2011-03-22 17:44:04 -07:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
mincore.c	thp: mincore transparent hugepage support	2011-01-13 17:32:44 -08:00
mlock.c	VM: skip the stack guard page lookup in get_user_pages only for mlock	2011-05-04 21:30:28 -07:00
mm_init.c
mmap.c	brk: COMPAT_BRK: fix detection of randomized brk	2011-04-14 16:06:55 -07:00
mmu_context.c	exit: fix oops in sync_mm_rss	2010-03-24 16:31:21 -07:00
mmu_notifier.c	thp: mmu_notifier_test_young	2011-01-13 17:32:46 -08:00
mmzone.c	mm: page allocator: adjust the per-cpu counter threshold when memory is low	2011-01-13 17:32:31 -08:00
mprotect.c	thp: mprotect: transparent huge page support	2011-01-13 17:32:44 -08:00
mremap.c	mm: avoid wrapping vm_pgoff in mremap()	2011-04-07 07:35:51 -07:00
msync.c	sanitize vfs_fsync calling conventions	2010-05-21 18:31:21 -04:00
nobootmem.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
nommu.c	NOMMU: implement access_remote_vm	2011-03-29 14:05:12 +01:00
oom_kill.c	oom: use pte pages in OOM score	2011-04-28 11:28:21 -07:00
page_alloc.c	mm/page_alloc.c: silence build_all_zonelists() section mismatch	2011-04-14 16:06:54 -07:00
page_cgroup.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
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	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
pagewalk.c	pagewalk: only split huge pages when necessary	2011-03-22 17:44:04 -07:00
percpu-km.c	percpu: clear memory allocated with the km allocator	2010-10-02 10:28:42 +03:00
percpu-vm.c	mm: remove gfp mask from pcpu_get_vm_areas	2011-01-13 17:32:34 -08:00
percpu.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
pgtable-generic.c	mm/pgtable-generic.c: fix CONFIG_SWAP=n build	2011-01-26 10:49:58 +10:00
prio_tree.c
quicklist.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
readahead.c	read-ahead: use plugging	2011-03-10 08:52:26 +01:00
rmap.c	fs: move i_wb_list out from under inode_lock	2011-03-24 21:17:51 -04:00
shmem.c	tmpfs: fix off-by-one in max_blocks checks	2011-04-14 16:06:55 -07:00
slab.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
slob.c	mm: Remove support for kmem_cache_name()	2011-01-23 21:00:05 +02:00
slub.c	slub: Fix the lockless code on 32-bit platforms with no 64-bit cmpxchg	2011-05-04 14:20:20 -07:00
sparse-vmemmap.c	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
sparse.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
swap_state.c	block: remove per-queue plugging	2011-03-10 08:52:07 +01:00
swap.c	mm: simplify code of swap.c	2011-03-22 17:44:09 -07:00
swapfile.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	mm: deactivate invalidated pages	2011-03-22 17:44:03 -07:00
util.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
vmalloc.c	vmalloc: remove confusing comment on vwrite()	2011-03-22 17:44:09 -07:00
vmscan.c	vmscan: all_unreclaimable() use zone->all_unreclaimable as a name	2011-04-14 16:06:56 -07:00
vmstat.c	mm: add VM counters for transparent hugepages	2011-04-14 16:06:55 -07:00