Use alignment macros, pagesize and powerof2.

We are replacing all of the bespoke alignment code with
ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN.
This cleans up malloc/malloc.c, malloc/arena.c, and
elf/dl-reloc.c. It also makes all the code consistently
use pagesize, and powerof2 as required.

Code size is reduced with the removal of precomputed
pagemask, and use of pagesize instead. No measurable
difference in performance.

No regressions on x86_64.

1 files changed, 16 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 068ed1baf7..cdf49aaa7e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2015-02-17  Carlos O'Donell  <carlos@redhat.com>
+
+	* dl-reloc.c: Inlucde libc-internal.h.
+	(_dl_try_allocate_static_tls): Call ALIGN_UP.
+	(_dl_relocate_object): Call ALIGN_UP, ALIGN_DOWN, and PTR_ALIGN_DOWN.
+	(_dl_protect_relro): Call ALIGN_UP and ALIGN_DOWN.
+	* malloc/arena.c (new_heap): Use pagesize. Call ALIGN_UP.
+	(grow_heap): Likewise.
+	* malloc/malloc.c: Include libc-internal.h.
+	(do_check_malloc): Call powerof2.
+	(sysmalloc): Use pagesize. Call ALIGN_UP.
+	(systrim): Use pagesize.
+	(mremap_chunk): Use pagesize. Call ALIGN_UP.
+	(__libc_valloc): Use pagesize.
+	(__libc_pvalloc): Use pagesize. Call ALIGN_UP.
+
 2015-02-17  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #17991]