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| author | Ingo Molnar <mingo@elte.hu> | 2008-11-12 12:39:21 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 12:39:21 +0100 |
| commit | 708b8eae0fd532af73ea8350e6dcc10255ff7376 (patch) | |
| tree | f336436934fd79bc91aff7112a9beb10bc4e839f /mm/vmalloc.c | |
| parent | mutex: improve header comment to be actually informative about the API (diff) | |
| parent | Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/k... (diff) | |
| download | linux-708b8eae0fd532af73ea8350e6dcc10255ff7376.tar.gz linux-708b8eae0fd532af73ea8350e6dcc10255ff7376.zip | |
Merge branch 'linus' into core/locking
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 036536945dd9..ba6b0f5f7fac 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -178,7 +178,7 @@ static int vmap_page_range(unsigned long addr, unsigned long end, static inline int is_vmalloc_or_module_addr(const void *x) { /* - * x86-64 and sparc64 put modules in a special place, + * ARM, x86-64 and sparc64 put modules in a special place, * and fall back on vmalloc() if that fails. Others * just put it in the vmalloc space. */ @@ -592,6 +592,8 @@ static void free_unmap_vmap_area_addr(unsigned long addr) #define VMAP_BLOCK_SIZE (VMAP_BBMAP_BITS * PAGE_SIZE) +static bool vmap_initialized __read_mostly = false; + struct vmap_block_queue { spinlock_t lock; struct list_head free; @@ -828,6 +830,9 @@ void vm_unmap_aliases(void) int cpu; int flush = 0; + if (unlikely(!vmap_initialized)) + return; + for_each_possible_cpu(cpu) { struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu); struct vmap_block *vb; @@ -897,7 +902,8 @@ EXPORT_SYMBOL(vm_unmap_ram); * @count: number of pages * @node: prefer to allocate data structures on this node * @prot: memory protection to use. PAGE_KERNEL for regular RAM - * @returns: a pointer to the address that has been mapped, or NULL on failure + * + * Returns: a pointer to the address that has been mapped, or %NULL on failure */ void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t prot) { @@ -941,6 +947,8 @@ void __init vmalloc_init(void) INIT_LIST_HEAD(&vbq->dirty); vbq->nr_dirty = 0; } + + vmap_initialized = true; } void unmap_kernel_range(unsigned long addr, unsigned long size) |