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linuxkpi compiler.h: avoid gcc -Wunused-value in dummy expressions

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It looks like the __acquire and __release macros are for the consumption
of static analysis tools and have no semantic effect.  Transform the
definitions from constant expressions to empty statements in order to
avoid -Wunused-value from gcc.

Likewise avoid future warnings for __chk_{user,io}_ptr, but with a cast
to void, because it looks like some linux kernel code may use those in
expression contexts.

Reviewed by:	hselasky, markj
Approved by:	markj (mentor)
Sponsored by:	Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D11695
This commit is contained in:
Ryan Libby 2017-07-22 21:29:44 +00:00
parent 0ecee546c5
commit 4e64c62564
1 changed files with 4 additions and 4 deletions
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8
sys/compat/linuxkpi/common/include/linux/compiler.h
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@ -40,13 +40,13 @@
#define __force
#define __nocast
#define __iomem
#define __chk_user_ptr(x) 0
#define __chk_io_ptr(x) 0
#define __chk_user_ptr(x) ((void)0)
#define __chk_io_ptr(x) ((void)0)
#define __builtin_warning(x, y...) (1)
#define __acquires(x)
#define __releases(x)
#define __acquire(x) 0
#define __release(x) 0
#define __acquire(x) do { } while (0)
#define __release(x) do { } while (0)
#define __cond_lock(x,c) (c)
#define __bitwise
#define __devinitdata