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| author | David Howells <dhowells@redhat.com> | 2009-04-02 16:56:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-02 19:04:48 -0700 |
| commit | 33e5d76979cf01e3834814fe0aea569d1d602c1a (patch) | |
| tree | 58a03e5da59db203245da10db144a4f6f61a83ba /kernel/fork.c | |
| parent | 5482415a5ecc0cd791a5d885cc3db8281401078f (diff) | |
| download | linux-33e5d76979cf01e3834814fe0aea569d1d602c1a.tar.gz linux-33e5d76979cf01e3834814fe0aea569d1d602c1a.tar.bz2 linux-33e5d76979cf01e3834814fe0aea569d1d602c1a.zip | |
nommu: fix a number of issues with the per-MM VMA patch
Fix a number of issues with the per-MM VMA patch:
(1) Make mmap_pages_allocated an atomic_long_t, just in case this is used on
a NOMMU system with more than 2G pages. Makes no difference on a 32-bit
system.
(2) Report vma->vm_pgoff * PAGE_SIZE as a 64-bit value, not a 32-bit value,
lest it overflow.
(3) Move the allocation of the vm_area_struct slab back for fork.c.
(4) Use KMEM_CACHE() for both vm_area_struct and vm_region slabs.
(5) Use BUG_ON() rather than if () BUG().
(6) Make the default validate_nommu_regions() a static inline rather than a
#define.
(7) Make free_page_series()'s objection to pages with a refcount != 1 more
informative.
(8) Adjust the __put_nommu_region() banner comment to indicate that the
semaphore must be held for writing.
(9) Limit the number of warnings about munmaps of non-mmapped regions.
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 47c15840a381..51d1aa21483b 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1488,6 +1488,7 @@ void __init proc_caches_init(void) mm_cachep = kmem_cache_create("mm_struct", sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); + vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC); mmap_init(); } |