Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / fs / ntfs / malloc.h

diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h
index af1a1cb..e38e402 100644 (file)
--- a/fs/ntfs/malloc.h
+++ b/fs/ntfs/malloc.h
@@ -1,7 +1,7 @@
 /*
  * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
  *
- * Copyright (c) 2001-2004 Anton Altaparmakov.
+ * Copyright (c) 2001-2005 Anton Altaparmakov
  *
  * This program/include file is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as published
@@ -24,38 +24,72 @@
 
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
+#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, gfp_t gfp_mask)
 {
        if (likely(size <= PAGE_SIZE)) {
-               if (likely(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); */
-               }
-               BUG();
+               BUG_ON(!size);
+               /* kmalloc() has per-CPU caches so is faster for now. */
+               return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
+               /* 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) ||
                        ((unsigned long)addr >= VMALLOC_END ))) {
-               return kfree(addr);
-               /* return free_page((unsigned long)addr); */
+               kfree(addr);
+               /* free_page((unsigned long)addr); */
+               return;
        }
        vfree(addr);
 }