diff options
| author | Marco Elver <elver@google.com> | 2025-12-19 16:39:50 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-01-05 16:43:26 +0100 |
| commit | de15fecae44df8254fa597bad7eb3680a8b1c10c (patch) | |
| tree | 3c969a41f299633660880d3d4e0a2c2829233dac /include/linux/compiler-context-analysis.h | |
| parent | de2c5a1523fde38411b6259064258a0c0a3c896a (diff) | |
compiler_types: Move lock checking attributes to compiler-context-analysis.h
The conditional definition of lock checking macros and attributes is
about to become more complex. Factor them out into their own header for
better readability, and to make it obvious which features are supported
by which mode (currently only Sparse). This is the first step towards
generalizing towards "context analysis".
No functional change intended.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251219154418.3592607-2-elver@google.com
Diffstat (limited to 'include/linux/compiler-context-analysis.h')
| -rw-r--r-- | include/linux/compiler-context-analysis.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/compiler-context-analysis.h b/include/linux/compiler-context-analysis.h new file mode 100644 index 000000000000..f8af63045281 --- /dev/null +++ b/include/linux/compiler-context-analysis.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Macros and attributes for compiler-based static context analysis. + */ + +#ifndef _LINUX_COMPILER_CONTEXT_ANALYSIS_H +#define _LINUX_COMPILER_CONTEXT_ANALYSIS_H + +#ifdef __CHECKER__ + +/* Sparse context/lock checking support. */ +# define __must_hold(x) __attribute__((context(x,1,1))) +# define __acquires(x) __attribute__((context(x,0,1))) +# define __cond_acquires(x) __attribute__((context(x,0,-1))) +# define __releases(x) __attribute__((context(x,1,0))) +# define __acquire(x) __context__(x,1) +# define __release(x) __context__(x,-1) +# define __cond_lock(x, c) ((c) ? ({ __acquire(x); 1; }) : 0) + +#else /* !__CHECKER__ */ + +# define __must_hold(x) +# define __acquires(x) +# define __cond_acquires(x) +# define __releases(x) +# define __acquire(x) (void)0 +# define __release(x) (void)0 +# define __cond_lock(x, c) (c) + +#endif /* __CHECKER__ */ + +#endif /* _LINUX_COMPILER_CONTEXT_ANALYSIS_H */ |