From: Arnd Bergmann Date: Sun, 5 Aug 2012 15:00:58 +0000 (+0000) Subject: mm/slob: use min_t() to compare ARCH_SLAB_MINALIGN X-Git-Tag: v3.7-rc2~4^2~1^2~4 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=baaf1dd491433a78826150aff7411015de7e9b65;p=karo-tx-linux.git mm/slob: use min_t() to compare ARCH_SLAB_MINALIGN The definition of ARCH_SLAB_MINALIGN is architecture dependent and can be either of type size_t or int. Comparing that value with ARCH_KMALLOC_MINALIGN can cause harmless warnings on platforms where they are different. Since both are always small positive integer numbers, using the size_t type to compare them is safe and gets rid of the warning. Without this patch, building ARM collie_defconfig results in: mm/slob.c: In function '__kmalloc_node': mm/slob.c:431:152: warning: comparison of distinct pointer types lacks a cast [enabled by default] mm/slob.c: In function 'kfree': mm/slob.c:484:153: warning: comparison of distinct pointer types lacks a cast [enabled by default] mm/slob.c: In function 'ksize': mm/slob.c:503:153: warning: comparison of distinct pointer types lacks a cast [enabled by default] Signed-off-by: Arnd Bergmann Acked-by: Christoph Lameter Cc: Pekka Enberg --- diff --git a/mm/slob.c b/mm/slob.c index 45d4ca79933a..497c55e318a1 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -428,7 +428,7 @@ out: void *__kmalloc_node(size_t size, gfp_t gfp, int node) { unsigned int *m; - int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); + int align = max_t(size_t, ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); void *ret; gfp &= gfp_allowed_mask; @@ -481,7 +481,7 @@ void kfree(const void *block) sp = virt_to_page(block); if (PageSlab(sp)) { - int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); + int align = max_t(size_t, ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); unsigned int *m = (unsigned int *)(block - align); slob_free(m, *m + align); } else @@ -500,7 +500,7 @@ size_t ksize(const void *block) sp = virt_to_page(block); if (PageSlab(sp)) { - int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); + int align = max_t(size_t, ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); unsigned int *m = (unsigned int *)(block - align); return SLOB_UNITS(*m) * SLOB_UNIT; } else