diff options
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 47 |
1 files changed, 20 insertions, 27 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 35f8553f893..1ac191ce564 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -24,6 +24,9 @@ DEFINE_RWLOCK(vmlist_lock); struct vm_struct *vmlist; +static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot, + int node); + static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end) { pte_t *pte; @@ -238,7 +241,6 @@ struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, /** * get_vm_area - reserve a contingous kernel virtual area - * * @size: size of the area * @flags: %VM_IOREMAP for I/O mappings or VM_ALLOC * @@ -270,7 +272,7 @@ static struct vm_struct *__find_vm_area(void *addr) } /* Caller must hold vmlist_lock */ -struct vm_struct *__remove_vm_area(void *addr) +static struct vm_struct *__remove_vm_area(void *addr) { struct vm_struct **p, *tmp; @@ -293,7 +295,6 @@ found: /** * remove_vm_area - find and remove a contingous kernel virtual area - * * @addr: base address * * Search for the kernel VM area starting at @addr, and remove it. @@ -330,6 +331,8 @@ void __vunmap(void *addr, int deallocate_pages) return; } + debug_check_no_locks_freed(addr, area->size); + if (deallocate_pages) { int i; @@ -338,7 +341,7 @@ void __vunmap(void *addr, int deallocate_pages) __free_page(area->pages[i]); } - if (area->nr_pages > PAGE_SIZE/sizeof(struct page *)) + if (area->flags & VM_VPAGES) vfree(area->pages); else kfree(area->pages); @@ -350,7 +353,6 @@ void __vunmap(void *addr, int deallocate_pages) /** * vfree - release memory allocated by vmalloc() - * * @addr: memory base address * * Free the virtually contiguous memory area starting at @addr, as @@ -368,7 +370,6 @@ EXPORT_SYMBOL(vfree); /** * vunmap - release virtual mapping obtained by vmap() - * * @addr: memory base address * * Free the virtually contiguous memory area starting at @addr, @@ -385,7 +386,6 @@ EXPORT_SYMBOL(vunmap); /** * vmap - map an array of pages into virtually contiguous space - * * @pages: array of page pointers * @count: number of pages to map * @flags: vm_area->flags @@ -425,9 +425,10 @@ void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask, area->nr_pages = nr_pages; /* Please note that the recursion is strictly bounded. */ - if (array_size > PAGE_SIZE) + if (array_size > PAGE_SIZE) { pages = __vmalloc_node(array_size, gfp_mask, PAGE_KERNEL, node); - else + area->flags |= VM_VPAGES; + } else pages = kmalloc_node(array_size, (gfp_mask & ~__GFP_HIGHMEM), node); area->pages = pages; if (!area->pages) { @@ -465,7 +466,6 @@ void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot) /** * __vmalloc_node - allocate virtually contiguous memory - * * @size: allocation size * @gfp_mask: flags for the page level allocator * @prot: protection mask for the allocated pages @@ -475,8 +475,8 @@ void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot) * allocator with @gfp_mask flags. Map them into contiguous * kernel virtual space, using a pagetable protection of @prot. */ -void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot, - int node) +static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot, + int node) { struct vm_struct *area; @@ -490,7 +490,6 @@ void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot, return __vmalloc_area_node(area, gfp_mask, prot, node); } -EXPORT_SYMBOL(__vmalloc_node); void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot) { @@ -500,9 +499,7 @@ EXPORT_SYMBOL(__vmalloc); /** * vmalloc - allocate virtually contiguous memory - * * @size: allocation size - * * Allocate enough pages to cover @size from the page level * allocator and map them into contiguous kernel virtual space. * @@ -516,11 +513,11 @@ void *vmalloc(unsigned long size) EXPORT_SYMBOL(vmalloc); /** - * vmalloc_user - allocate virtually contiguous memory which has - * been zeroed so it can be mapped to userspace without - * leaking data. + * vmalloc_user - allocate zeroed virtually contiguous memory for userspace + * @size: allocation size * - * @size: allocation size + * The resulting memory area is zeroed so it can be mapped to userspace + * without leaking data. */ void *vmalloc_user(unsigned long size) { @@ -539,7 +536,6 @@ EXPORT_SYMBOL(vmalloc_user); /** * vmalloc_node - allocate memory on a specific node - * * @size: allocation size * @node: numa node * @@ -561,7 +557,6 @@ EXPORT_SYMBOL(vmalloc_node); /** * vmalloc_exec - allocate virtually contiguous, executable memory - * * @size: allocation size * * Kernel-internal function to allocate enough pages to cover @size @@ -579,7 +574,6 @@ void *vmalloc_exec(unsigned long size) /** * vmalloc_32 - allocate virtually contiguous memory (32bit addressable) - * * @size: allocation size * * Allocate enough 32bit PA addressable pages to cover @size from the @@ -592,11 +586,11 @@ void *vmalloc_32(unsigned long size) EXPORT_SYMBOL(vmalloc_32); /** - * vmalloc_32_user - allocate virtually contiguous memory (32bit - * addressable) which is zeroed so it can be - * mapped to userspace without leaking data. - * + * vmalloc_32_user - allocate zeroed virtually contiguous 32bit memory * @size: allocation size + * + * The resulting memory area is 32bit addressable and zeroed so it can be + * mapped to userspace without leaking data. */ void *vmalloc_32_user(unsigned long size) { @@ -690,7 +684,6 @@ finished: /** * remap_vmalloc_range - map vmalloc pages to userspace - * * @vma: vma to cover (map full range of vma) * @addr: vmalloc memory * @pgoff: number of pages into addr before first page to map |