SLOB: fix bogus ksize calculation fix

[linux-2.6-omap-h63xx.git] / mm / slob.c

diff --git a/mm/slob.c b/mm/slob.c
index d8fbd4d1bfa7e6fee9d538929349a0efd4740ca8..cb675d1267914dc263100b9c4a9ea5eb20fefa48 100644 (file)
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -514,12 +514,13 @@ size_t ksize(const void *block)
                return 0;
 
        sp = (struct slob_page *)virt_to_page(block);
-       if (slob_page(sp))
-               return ((slob_t *)block - 1)->units + SLOB_UNIT;
-       else
+       if (slob_page(sp)) {
+               int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN);
+               unsigned int *m = (unsigned int *)(block - align);
+               return SLOB_UNITS(*m) * SLOB_UNIT;
+       } else
                return sp->page.private;
 }
-EXPORT_SYMBOL(ksize);
 
 struct kmem_cache {
        unsigned int size, align;