mm/slab_common.c: make calculate_alignment() static

calculate_alignment() function is only used inside slab_common.c.  So
make it static and let the compiler do more optimizations.

After this patch there's a small improvement in text and data size.

  $ gcc --version
    gcc (GCC) 7.2.1 20171128

Before:
  text	   data	    bss	    dec	     hex	filename
  9890457  3828702  1212364 14931523 e3d643	vmlinux

After:
  text	   data	    bss	    dec	     hex	filename
  9890437  3828670  1212364 14931471 e3d60f	vmlinux

Also I fixed a style problem reported by checkpatch.

  WARNING: Missing a blank line after declarations
  #53: FILE: mm/slab_common.c:286:
  +		unsigned long ralign = cache_line_size();
  +		while (size <= ralign / 2)

Link: http://lkml.kernel.org/r/20171210080132.406-1-bhlee.kernel@gmail.com
Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/mm/slab.h b/mm/slab.h
index ad657ffa44e5..e8e2095a6185 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -78,9 +78,6 @@ extern const struct kmalloc_info_struct {
 	unsigned long size;
 } kmalloc_info[];
 
-unsigned long calculate_alignment(slab_flags_t flags,
-		unsigned long align, unsigned long size);
-
 #ifndef CONFIG_SLOB
 /* Kmalloc array related functions */
 void setup_kmalloc_cache_index_table(void);