From 789306e5ad6b3051c263ac2478875efa8bc07462 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 5 Oct 2012 16:55:20 +0200 Subject: [PATCH] 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] Acked-by: Christoph Lameter Signed-off-by: Arnd Bergmann [ penberg@kernel.org: updates for master ] Signed-off-by: Pekka Enberg --- mm/slob.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/slob.c b/mm/slob.c index e7d790127e4b..87e16c4d9143 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -428,7 +428,7 @@ static __always_inline void * __do_kmalloc_node(size_t size, gfp_t gfp, int node, unsigned long caller) { 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; @@ -496,7 +496,7 @@ 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 @@ -519,7 +519,7 @@ size_t ksize(const void *block) if (unlikely(!PageSlab(sp))) return PAGE_SIZE << compound_order(sp); - align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); + align = max_t(size_t, ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN); m = (unsigned int *)(block - align); return SLOB_UNITS(*m) * SLOB_UNIT; } -- GitLab