mirror of
https://github.com/Fishwaldo/Star64_linux.git
synced 2025-07-22 14:52:34 +00:00
include/linux/compiler*.h: fix OPTIMIZER_HIDE_VAR
Since commit815f0ddb34
("include/linux/compiler*.h: make compiler-*.h mutually exclusive") clang no longer reuses the OPTIMIZER_HIDE_VAR macro from compiler-gcc - instead it gets the version in include/linux/compiler.h. Unfortunately that version doesn't actually prevent compiler from optimizing out the variable. Fix up by moving the macro out from compiler-gcc.h to compiler.h. Compilers without incline asm support will keep working since it's protected by an ifdef. Also fix up comments to match reality since we are no longer overriding any macros. Build-tested with gcc and clang. Fixes:815f0ddb34
("include/linux/compiler*.h: make compiler-*.h mutually exclusive") Cc: Eli Friedman <efriedma@codeaurora.org> Cc: Joe Perches <joe@perches.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
This commit is contained in:
parent
bfeffd1552
commit
3e2ffd655c
4 changed files with 6 additions and 11 deletions
|
@ -58,10 +58,6 @@
|
|||
(typeof(ptr)) (__ptr + (off)); \
|
||||
})
|
||||
|
||||
/* Make the optimizer believe the variable can be manipulated arbitrarily. */
|
||||
#define OPTIMIZER_HIDE_VAR(var) \
|
||||
__asm__ ("" : "=r" (var) : "0" (var))
|
||||
|
||||
/*
|
||||
* A trick to suppress uninitialized variable warning without generating any
|
||||
* code
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue