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dab
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2018-07-11T14:56:38.159168Z
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V 917
MFC r335765, r335776, r336186:

Remove potential identifier conflict in the EV_SET macro.

PR43905 pointed out a problem with the EV_SET macro if the passed
struct kevent pointer were specified with an expression with side
effects (e.g., "kevp++"). This was fixed in rS110241, but by using a
local block that defined an internal variable (named "kevp") to get
the pointer value once. This worked, but could cause issues if an
existing variable named "kevp" is in scope. To avoid that issue,
jilles@ pointed out that "C99 compound literals and designated
initializers allow doing this cleanly using a macro". This change
incorporates that suggestion, essentially verbatim from jilles@
comment on PR43905, except retaining the old definition for pre-C99 or
non-STDC (e.g., C++) compilers.

PR:	43905
Submitted by:	Jilles Tjoelker (jilles@)
Reported by:	Lamont Granquist <lamont@scriptkiddie.org>
Sponsored by:	Dell EMC

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