Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

[pandora-kernel.git] / arch / powerpc / lib / rheap.c

diff --git a/arch/powerpc/lib/rheap.c b/arch/powerpc/lib/rheap.c
index 31e5118..57bf991 100644 (file)
--- a/arch/powerpc/lib/rheap.c
+++ b/arch/powerpc/lib/rheap.c
@@ -423,17 +423,21 @@ void *rh_detach_region(rh_info_t * info, void *start, int size)
        return (void *)s;
 }
 
-void *rh_alloc(rh_info_t * info, int size, const char *owner)
+void *rh_alloc_align(rh_info_t * info, int size, int alignment, const char *owner)
 {
        struct list_head *l;
        rh_block_t *blk;
        rh_block_t *newblk;
        void *start;
 
-       /* Validate size */
-       if (size <= 0)
+       /* Validate size, (must be power of two) */
+       if (size <= 0 || (alignment & (alignment - 1)) != 0)
                return ERR_PTR(-EINVAL);
 
+       /* given alignment larger that default rheap alignment */
+       if (alignment > info->alignment)
+               size += alignment - 1;
+
        /* Align to configured alignment */
        size = (size + (info->alignment - 1)) & ~(info->alignment - 1);
 
@@ -476,15 +480,27 @@ void *rh_alloc(rh_info_t * info, int size, const char *owner)
 
        attach_taken_block(info, newblk);
 
+       /* for larger alignment return fixed up pointer  */
+       /* this is no problem with the deallocator since */
+       /* we scan for pointers that lie in the blocks   */
+       if (alignment > info->alignment)
+               start = (void *)(((unsigned long)start + alignment - 1) &
+                               ~(alignment - 1));
+
        return start;
 }
 
+void *rh_alloc(rh_info_t * info, int size, const char *owner)
+{
+       return rh_alloc_align(info, size, info->alignment, owner);
+}
+
 /* allocate at precisely the given address */
 void *rh_alloc_fixed(rh_info_t * info, void *start, int size, const char *owner)
 {
        struct list_head *l;
        rh_block_t *blk, *newblk1, *newblk2;
-       unsigned long s, e, m, bs, be;
+       unsigned long s, e, m, bs = 0, be = 0;
 
        /* Validate size */
        if (size <= 0)