Messages in this thread | | | Subject | Re: [PATCH 00/15] trivial: Drop unlikely before IS_ERR(_OR_NULL) | From | Vlastimil Babka <> | Date | Fri, 31 Jul 2015 11:41:09 +0200 |
| |
On 07/31/2015 10:38 AM, Viresh Kumar wrote: > Hi, > > This cleans up the usage of IS_ERR(_OR_NULL)(), where the callers have > added additional unlikely compiler flag to them. It also fixes the > definition of IS_ERR_OR_NULL(), to use unlikely for all checks it does.
[+CC Steven Rostedt]
Any idea what the compiler does in the case of "if (likely(IS_ERR(...)))"? There are apparently such cases in the source.
does the "likely" somehow override the "unlikely" of IS_ERR, or is the resulting code a mess?
Vlastimil
> Viresh Kumar (15): > err.h: add (missing) unlikely() to IS_ERR_OR_NULL() > PM / OPP: Drop unlikely before IS_ERR(_OR_NULL) > drivers: devfreq: Drop unlikely before IS_ERR(_OR_NULL) > drivers: gpu: Drop unlikely before IS_ERR(_OR_NULL) > drivers: input: Drop unlikely before IS_ERR(_OR_NULL) > drivers: md: Drop unlikely before IS_ERR(_OR_NULL) > drivers: misc: Drop unlikely before IS_ERR(_OR_NULL) > drivers: net: Drop unlikely before IS_ERR(_OR_NULL) > drivers: rtc: Drop unlikely before IS_ERR(_OR_NULL) > drivers: staging: Drop unlikely before IS_ERR(_OR_NULL) > drivers: target: Drop unlikely before IS_ERR(_OR_NULL) > fs: Drop unlikely before IS_ERR(_OR_NULL) > blk-cgroup: Drop unlikely before IS_ERR(_OR_NULL) > mm: Drop unlikely before IS_ERR(_OR_NULL) > net: Drop unlikely before IS_ERR(_OR_NULL) > > drivers/base/power/opp.c | 6 +++--- > drivers/devfreq/devfreq.c | 4 ++-- > drivers/gpu/drm/ttm/ttm_tt.c | 4 ++-- > drivers/gpu/drm/vmwgfx/vmwgfx_context.c | 2 +- > drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +- > drivers/input/mouse/alps.c | 2 +- > drivers/md/dm-snap-persistent.c | 2 +- > drivers/md/dm-verity.c | 2 +- > drivers/md/persistent-data/dm-block-manager.c | 8 ++++---- > drivers/misc/c2port/core.c | 2 +- > drivers/net/ethernet/ti/netcp_core.c | 4 ++-- > drivers/rtc/interface.c | 2 +- > drivers/rtc/rtc-bfin.c | 2 +- > drivers/rtc/rtc-gemini.c | 2 +- > drivers/staging/android/ashmem.c | 2 +- > drivers/staging/lustre/include/linux/libcfs/libcfs.h | 2 +- > drivers/staging/lustre/lustre/obdclass/lu_object.c | 6 +++--- > drivers/target/tcm_fc/tfc_cmd.c | 2 +- > fs/cifs/readdir.c | 2 +- > fs/ecryptfs/inode.c | 2 +- > fs/ext4/extents.c | 6 +++--- > fs/ext4/namei.c | 2 +- > fs/namei.c | 4 ++-- > fs/ncpfs/dir.c | 2 +- > fs/nfs/objlayout/objio_osd.c | 2 +- > fs/proc/proc_sysctl.c | 2 +- > include/linux/blk-cgroup.h | 2 +- > include/linux/err.h | 2 +- > mm/huge_memory.c | 2 +- > net/openvswitch/datapath.c | 2 +- > net/sctp/socket.c | 2 +- > net/socket.c | 6 +++--- > 32 files changed, 47 insertions(+), 47 deletions(-) >
| |