diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-09-25 20:27:53 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-09-25 20:27:53 +0000 |
| commit | 82d5d5229ce1480e0dc8cd19039676fc6eba9b8a (patch) | |
| tree | 012cf6c64d010f8da6967b1475615747d3bd87c9 /sys | |
| parent | c7c27e189cb11e9180063b785505d68d637a2375 (diff) | |
Apparently 0 is not a power of 2 (despite <sys/param.h> claiming that it is).
Fixes inteldrm(4) on the GM45 chipset.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/pci/drm/drm_linux.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/dev/pci/drm/drm_linux.h b/sys/dev/pci/drm/drm_linux.h index 124f54ed58e..e12188455d8 100644 --- a/sys/dev/pci/drm/drm_linux.h +++ b/sys/dev/pci/drm/drm_linux.h @@ -1,4 +1,4 @@ -/* $OpenBSD: drm_linux.h,v 1.35 2015/09/24 20:52:28 kettenis Exp $ */ +/* $OpenBSD: drm_linux.h,v 1.36 2015/09/25 20:27:52 kettenis Exp $ */ /* * Copyright (c) 2013, 2014, 2015 Mark Kettenis * @@ -1002,7 +1002,7 @@ roundup_pow_of_two(unsigned long x) return (1UL << flsl(x - 1)); } -#define is_power_of_2(x) ((((x)-1)&(x))==0) +#define is_power_of_2(x) (x != 0 && (((x) - 1) & (x)) == 0) #define PAGE_ALIGN(addr) (((addr) + PAGE_MASK) & ~PAGE_MASK) #define IS_ALIGNED(x, y) (((x) & ((y) - 1)) == 0) |