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
..
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
Makefile	bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c	2011-02-24 14:43:05 +01:00
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	…
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	…
dmapool.c	mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()	2011-01-13 17:32:48 -08:00
fadvise.c	…
failslab.c	…
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
filemap_xip.c	…
fremap.c	…
highmem.c	…
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	…
internal.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
kmemcheck.c	…
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	…
madvise.c	thp: khugepaged: make khugepaged aware about madvise	2011-01-13 17:32:47 -08:00
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-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
memory_hotplug.c	mm: optimize pfn calculation in online_page()	2011-04-14 16:06:54 -07:00
mempolicy.c	mempolicy: remove redundant check in __mpol_equal()	2011-03-22 17:44:04 -07:00
mempool.c	…
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	…
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	…
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-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
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	…
pagewalk.c	pagewalk: only split huge pages when necessary	2011-03-22 17:44:04 -07:00
percpu-km.c	…
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	…
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	…
sparse.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
swap.c	mm: simplify code of swap.c	2011-03-22 17:44:09 -07:00
swap_state.c	block: remove per-queue plugging	2011-03-10 08:52:07 +01:00
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	…
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