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| author | Ingo Molnar <mingo@elte.hu> | 2009-03-01 12:47:58 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-01 12:47:58 +0100 |
| commit | 55f2b78995826d549401bdf20abeac1832636bb6 (patch) | |
| tree | 931b31f3b6e0879df0f9a1d58ffd040d9a652f2e /mm/vmalloc.c | |
| parent | Revert "gpu/drm, x86, PAT: PAT support for io_mapping_*" (diff) | |
| parent | x86: i915 needs pgprot_writecombine() and is_io_mapping_possible() (diff) | |
| download | linux-55f2b78995826d549401bdf20abeac1832636bb6.tar.xz linux-55f2b78995826d549401bdf20abeac1832636bb6.zip | |
Merge branch 'x86/urgent' into x86/pat
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 7774c6328970..11a929872ebd 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -323,6 +323,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size, unsigned long addr; int purged = 0; + BUG_ON(!size); BUG_ON(size & ~PAGE_MASK); va = kmalloc_node(sizeof(struct vmap_area), @@ -334,6 +335,9 @@ retry: addr = ALIGN(vstart, align); spin_lock(&vmap_area_lock); + if (addr + size - 1 < addr) + goto overflow; + /* XXX: could have a last_hole cache */ n = vmap_area_root.rb_node; if (n) { @@ -365,6 +369,8 @@ retry: while (addr + size > first->va_start && addr + size <= vend) { addr = ALIGN(first->va_end + PAGE_SIZE, align); + if (addr + size - 1 < addr) + goto overflow; n = rb_next(&first->rb_node); if (n) @@ -375,6 +381,7 @@ retry: } found: if (addr + size > vend) { +overflow: spin_unlock(&vmap_area_lock); if (!purged) { purge_vmap_area_lazy(); @@ -498,6 +505,7 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end, static DEFINE_SPINLOCK(purge_lock); LIST_HEAD(valist); struct vmap_area *va; + struct vmap_area *n_va; int nr = 0; /* @@ -537,7 +545,7 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end, if (nr) { spin_lock(&vmap_area_lock); - list_for_each_entry(va, &valist, purge_list) + list_for_each_entry_safe(va, n_va, &valist, purge_list) __free_vmap_area(va); spin_unlock(&vmap_area_lock); } |