Author: mjg
Date: Fri Sep 21 13:20:41 2018
New Revision: 338855
URL: https://svnweb.freebsd.org/changeset/base/338855
Log:
select: stop doing zero-sized memsets
Approved by: re (kib)
Modified:
head/sys/kern/sys_generic.c
Modified: head/sys/kern/sys_generic.c
==============================================================================
--- head/sys/kern/sys_generic.c Fri Sep 21 13:02:25 2018 (r338854)
+++ head/sys/kern/sys_generic.c Fri Sep 21 13:20:41 2018 (r338855)
@@ -1031,8 +1031,9 @@ kern_select(struct thread *td, int nd, fd_set *fd_in,
error = copyin(name, ibits[x], ncpubytes); \
if (error != 0) \
goto done; \
- bzero((char *)ibits[x] + ncpubytes, \
- ncpbytes - ncpubytes); \
+ if (ncpbytes != ncpubytes) \
+ bzero((char *)ibits[x] + ncpubytes, \
+ ncpbytes - ncpubytes); \
} \
} while (0)
getbits(fd_in, 0);
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