David Miller 2dca6999ee mm, perf_event: Make vmalloc_user() align base kernel virtual address to SHMLBA ... When a vmalloc'd area is mmap'd into userspace, some kind of co-ordination is necessary for this to work on platforms with cpu D-caches which can have aliases. Otherwise kernel side writes won't be seen properly in userspace and vice versa. If the kernel side mapping and the user side one have the same alignment, modulo SHMLBA, this can work as long as VM_SHARED is shared of VMA and for all current users this is true. VM_SHARED will force SHMLBA alignment of the user side mmap on platforms with D-cache aliasing matters. The bulk of this patch is just making it so that a specific alignment can be passed down into __get_vm_area_node(). All existing callers pass in '1' which preserves existing behavior. vmalloc_user() gives SHMLBA for the alignment. As a side effect this should get the video media drivers and other vmalloc_user() users into more working shape on such systems. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <200909211922.n8LJMYjw029425@imap1.linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-10-08 17:02:31 +02:00
..
allocpercpu.c	percpu: use dynamic percpu allocator as the default percpu allocator	2009-06-24 15:13:35 +09:00
backing-dev.c	writeback: splice dirty inode entries to default bdi on bdi_destroy()	2009-09-16 15:18:52 +02:00
bootmem.c	kmemleak: Do not report alloc_bootmem blocks as leaks	2009-08-27 14:29:17 +01:00
bounce.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapools: protect page_list walk in show_pools()	2009-06-30 18:56:00 -07:00
fadvise.c	readahead: move max_sane_readahead() calls into force_page_cache_readahead()	2009-06-16 19:47:28 -07:00
failslab.c	kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c	2009-04-03 12:23:01 +02:00
filemap_xip.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
filemap.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
fremap.c	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
highmem.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
hugetlb.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
hwpoison-inject.c	HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs	2009-09-16 11:50:17 +02:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	mm: move highest_memmap_pfn	2009-09-22 07:17:41 -07:00
Kconfig	x86: Fix hwpoison code related build failure on 32-bit NUMAQ	2009-09-27 09:55:11 +02:00
Kconfig.debug	trivial: improve help text for mm debug config options	2009-09-21 15:14:57 +02:00
kmemcheck.c	kmemcheck: add hooks for the page allocator	2009-06-15 15:48:33 +02:00
kmemleak-test.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
kmemleak.c	kmemleak: Improve the "Early log buffer exceeded" error message	2009-09-11 10:42:09 +01:00
ksm.c	ksm: change default values to better fit into mainline kernel	2009-09-24 07:20:56 -07:00
maccess.c	[S390] maccess: add weak attribute to probe_kernel_write	2009-06-12 10:27:37 +02:00
madvise.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
Makefile	procfs: disable per-task stack usage on NOMMU	2009-09-24 17:11:24 -07:00
memcontrol.c	memcg: show swap usage in stat file	2009-09-24 07:20:59 -07:00
memory_hotplug.c	walk system ram range	2009-09-23 07:39:41 -07:00
memory-failure.c	HWPOISON: The high level memory error handler in the VM v7	2009-09-16 11:50:15 +02:00
memory.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-09-24 08:32:11 -07:00
mempolicy.c	mm: make set_mempolicy(MPOL_INTERLEAV) N_HIGH_MEMORY aware	2009-08-07 10:39:55 -07:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
mincore.c	[CVE-2009-0029] System call wrappers part 14	2009-01-14 14:15:24 +01:00
mlock.c	mm: m(un)lock avoid ZERO_PAGE	2009-09-22 07:17:40 -07:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
mmu_context.c	mm: reduce atomic use on use_mm fast path	2009-09-22 07:17:42 -07:00
mmu_notifier.c	ksm: add mmu_notifier set_pte_at_notify()	2009-09-22 07:17:31 -07:00
mmzone.c	[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2	2009-05-18 11:22:24 +01:00
mprotect.c	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
mremap.c	truncate: new helpers	2009-09-24 08:41:47 -04:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
oom_kill.c	oom: oom_kill doesn't kill vfork parent (or child)	2009-09-22 07:17:39 -07:00
page_alloc.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
page_cgroup.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
page_io.c	mm: remove file argument from swap_readpage()	2009-06-16 19:47:44 -07:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
page-writeback.c	writeback: pass in super_block to bdi_start_writeback()	2009-09-26 00:10:40 +02:00
pagewalk.c	pagemap: pass mm into pagewalkers	2008-06-12 18:05:41 -07:00
percpu.c	Merge branch 'for-next' into for-linus	2009-09-15 09:57:19 +09:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	cpumask: use new-style cpumask ops in mm/quicklist.	2009-09-24 09:34:52 +09:30
readahead.c	readahead: introduce context readahead algorithm	2009-06-16 19:47:30 -07:00
rmap.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
shmem_acl.c	shmfs: use 'check_acl' instead of 'permission'	2009-09-08 11:08:46 -07:00
shmem.c	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
slab.c	mm: replace various uses of num_physpages by totalram_pages	2009-09-22 07:17:38 -07:00
slob.c	slab: remove duplicate kmem_cache_init_late() declarations	2009-08-06 11:36:25 +03:00
slub.c	mm: kmem_cache_create(): make it easier to catch NULL cache names	2009-09-22 07:17:33 -07:00
sparse-vmemmap.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
sparse.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
swap_state.c	mm: add_to_swap_cache() does not return -EEXIST	2009-09-22 07:17:35 -07:00
swap.c	mm: replace various uses of num_physpages by totalram_pages	2009-09-22 07:17:38 -07:00
swapfile.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2009-09-24 07:53:22 -07:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-09-24 08:32:11 -07:00
util.c	Merge branches 'slab/documentation', 'slab/fixes', 'slob/cleanups' and 'slub/fixes' into for-linus	2009-06-17 08:30:15 +03:00
vmalloc.c	mm, perf_event: Make vmalloc_user() align base kernel virtual address to SHMLBA	2009-10-08 17:02:31 +02:00
vmscan.c	Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block	2009-09-25 09:27:30 -07:00
vmstat.c	mm: vmstat: add isolate pages	2009-09-22 07:17:29 -07:00