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| author | Nick Desaulniers <ndesaulniers@google.com> | 2023-08-31 19:33:40 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 20:41:56 +0300 |
| commit | a8306f2d4dcea03538c70c26d2948483f70254ff (patch) | |
| tree | 96e9888099e6249fa519b854eb76957ea16c8433 /include/linux/compiler.h | |
| parent | c0d2f4ce5c9fbc3e3b219d828b77ecd4445c1ad2 (diff) | |
| download | linux-a8306f2d4dcea03538c70c26d2948483f70254ff.tar.xz | |
compiler.h: unify __UNIQUE_ID
commit 6f33d58794ef ("__UNIQUE_ID()")
added a fallback definition of __UNIQUE_ID because gcc 4.2 and older did
not support __COUNTER__.
Also, this commit is effectively a revert of
commit b41c29b0527c ("Kbuild: provide a __UNIQUE_ID for clang")
which mentions clang 2.6+ supporting __COUNTER__.
Documentation/process/changes.rst currently lists the minimum supported
version of these compilers as:
- gcc: 5.1
- clang: 11.0.0
It should be safe to say that __COUNTER__ is well supported by this
point.
Link: https://lkml.kernel.org/r/20230831-unique_id-v1-1-28bacd18eb1d@google.com
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Michal rarek <mmarek@suse.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Paul Russel <rusty@rustcorp.com.au>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index d7779a18b24f..174099fdc485 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -177,10 +177,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, __asm__ ("" : "=r" (var) : "0" (var)) #endif -/* Not-quite-unique ID. */ -#ifndef __UNIQUE_ID -# define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __LINE__) -#endif +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) /** * data_race - mark an expression as containing intentional data races |