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Replace divide and multiply with mask in sYSTRIm

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Anton Blanchard 2010-08-16 23:06:55 -07:00 committed by Ulrich Drepper
parent 004c737f7b
commit b9b42ee01c
3 changed files with 11 additions and 6 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2010-07-26 Anton Blanchard <anton@samba.org>
* malloc/malloc.c (sYSTRIm): Replace divide and multiply with mask.
* malloc/arena.c (heap_trim): Likewise.
2010-08-16 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/syscalls.list: Add entry for fanotify_init

4
malloc/arena.c
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@ -1,5 +1,5 @@
/* Malloc implementation for multiple threads without lock contention.
Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2009
Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2009,2010
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wg@malloc.de>, 2001.
@ -879,7 +879,7 @@ heap_trim(heap, pad) heap_info *heap; size_t pad;
/*check_chunk(ar_ptr, top_chunk);*/
}
top_size = chunksize(top_chunk);
extra = ((top_size - pad - MINSIZE + (pagesz-1))/pagesz - 1) * pagesz;
extra = (top_size - pad - MINSIZE - 1) & ~(pagesz - 1);
if(extra < (long)pagesz)
return 0;
/* Try to shrink. */

2
malloc/malloc.c
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@ -3466,7 +3466,7 @@ static int sYSTRIm(pad, av) size_t pad; mstate av;
top_size = chunksize(av->top);
/* Release in pagesize units, keeping at least one page */
extra = ((top_size - pad - MINSIZE + (pagesz-1)) / pagesz - 1) * pagesz;
extra = (top_size - pad - MINSIZE - 1) & ~(pagesz - 1);
if (extra > 0) {