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authorAnton Altaparmakov <aia21@cantab.net>2005-09-08 16:28:25 +0100
committerAnton Altaparmakov <aia21@cantab.net>2005-09-08 16:28:25 +0100
commit06d0e3cf3d527f927681773c6ffbe697ccc5db7f (patch)
treee9692f00331c8951752785481c893d242bf9a29d /fs/ntfs/malloc.h
parente7a1033b946f4f2622f2b338ab107f559aad542c (diff)
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NTFS: Allow highmem kmalloc() in ntfs_malloc_nofs() and add _nofail() version.
- Modify fs/ntfs/malloc.h::ntfs_malloc_nofs() to do the kmalloc() based allocations with __GFP_HIGHMEM, analogous to how the vmalloc() based allocations are done. - Add fs/ntfs/malloc.h::ntfs_malloc_nofs_nofail() which is analogous to ntfs_malloc_nofs() but it performs allocations with __GFP_NOFAIL and hence cannot fail. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Diffstat (limited to 'fs/ntfs/malloc.h')
-rw-r--r--fs/ntfs/malloc.h48
1 files changed, 42 insertions, 6 deletions
diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h
index fac5944..9994e01 100644
--- a/fs/ntfs/malloc.h
+++ b/fs/ntfs/malloc.h
@@ -27,27 +27,63 @@
#include <linux/highmem.h>
/**
- * ntfs_malloc_nofs - allocate memory in multiples of pages
- * @size number of bytes to allocate
+ * __ntfs_malloc - allocate memory in multiples of pages
+ * @size: number of bytes to allocate
+ * @gfp_mask: extra flags for the allocator
+ *
+ * Internal function. You probably want ntfs_malloc_nofs()...
*
* Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
* returns a pointer to the allocated memory.
*
* If there was insufficient memory to complete the request, return NULL.
+ * Depending on @gfp_mask the allocation may be guaranteed to succeed.
*/
-static inline void *ntfs_malloc_nofs(unsigned long size)
+static inline void *__ntfs_malloc(unsigned long size,
+ unsigned int __nocast gfp_mask)
{
if (likely(size <= PAGE_SIZE)) {
BUG_ON(!size);
/* kmalloc() has per-CPU caches so is faster for now. */
- return kmalloc(PAGE_SIZE, GFP_NOFS);
- /* return (void *)__get_free_page(GFP_NOFS | __GFP_HIGHMEM); */
+ return kmalloc(PAGE_SIZE, gfp_mask);
+ /* return (void *)__get_free_page(gfp_mask); */
}
if (likely(size >> PAGE_SHIFT < num_physpages))
- return __vmalloc(size, GFP_NOFS | __GFP_HIGHMEM, PAGE_KERNEL);
+ return __vmalloc(size, gfp_mask, PAGE_KERNEL);
return NULL;
}
+/**
+ * ntfs_malloc_nofs - allocate memory in multiples of pages
+ * @size: number of bytes to allocate
+ *
+ * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
+ * returns a pointer to the allocated memory.
+ *
+ * If there was insufficient memory to complete the request, return NULL.
+ */
+static inline void *ntfs_malloc_nofs(unsigned long size)
+{
+ return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM);
+}
+
+/**
+ * ntfs_malloc_nofs_nofail - allocate memory in multiples of pages
+ * @size: number of bytes to allocate
+ *
+ * Allocates @size bytes of memory, rounded up to multiples of PAGE_SIZE and
+ * returns a pointer to the allocated memory.
+ *
+ * This function guarantees that the allocation will succeed. It will sleep
+ * for as long as it takes to complete the allocation.
+ *
+ * If there was insufficient memory to complete the request, return NULL.
+ */
+static inline void *ntfs_malloc_nofs_nofail(unsigned long size)
+{
+ return __ntfs_malloc(size, GFP_NOFS | __GFP_HIGHMEM | __GFP_NOFAIL);
+}
+
static inline void ntfs_free(void *addr)
{
if (likely(((unsigned long)addr < VMALLOC_START) ||
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