diff options
| author | Petr Pavlu <petr.pavlu@suse.com> | 2025-06-18 14:50:35 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-09 22:42:14 -0700 |
| commit | d29d64afa2b20d9bd210c01bfff78545675b5135 (patch) | |
| tree | 7940d787ed8b484c05ddca97ec2f709e8546743e | |
| parent | f9550e1fcf3bef802c18fadc5c65485b66b28a63 (diff) | |
codetag: avoid unused alloc_tags sections/symbols
With CONFIG_MEM_ALLOC_PROFILING=n, vmlinux and all modules unnecessarily
contain the symbols __start_alloc_tags and __stop_alloc_tags, which define
an empty range. In the case of modules, the presence of these symbols
also forces the linker to create an empty .codetag.alloc_tags section.
Update codetag.lds.h to make the data conditional on
CONFIG_MEM_ALLOC_PROFILING.
Link: https://lkml.kernel.org/r/20250618125037.53182-1-petr.pavlu@suse.com
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Reviewed-by: Kent Overstreet <kent.overstreet@linux.dev>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Casey Chen <cachen@purestorage.com>
Cc: Petr Pavlu <petr.pavlu@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/asm-generic/codetag.lds.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/asm-generic/codetag.lds.h b/include/asm-generic/codetag.lds.h index a45fe3d141a1..a14f4bdafdda 100644 --- a/include/asm-generic/codetag.lds.h +++ b/include/asm-generic/codetag.lds.h @@ -2,6 +2,12 @@ #ifndef __ASM_GENERIC_CODETAG_LDS_H #define __ASM_GENERIC_CODETAG_LDS_H +#ifdef CONFIG_MEM_ALLOC_PROFILING +#define IF_MEM_ALLOC_PROFILING(...) __VA_ARGS__ +#else +#define IF_MEM_ALLOC_PROFILING(...) +#endif + #define SECTION_WITH_BOUNDARIES(_name) \ . = ALIGN(8); \ __start_##_name = .; \ @@ -9,7 +15,7 @@ __stop_##_name = .; #define CODETAG_SECTIONS() \ - SECTION_WITH_BOUNDARIES(alloc_tags) + IF_MEM_ALLOC_PROFILING(SECTION_WITH_BOUNDARIES(alloc_tags)) #define MOD_SEPARATE_CODETAG_SECTION(_name) \ .codetag.##_name : { \ @@ -22,6 +28,6 @@ * unload them individually once unused. */ #define MOD_SEPARATE_CODETAG_SECTIONS() \ - MOD_SEPARATE_CODETAG_SECTION(alloc_tags) + IF_MEM_ALLOC_PROFILING(MOD_SEPARATE_CODETAG_SECTION(alloc_tags)) #endif /* __ASM_GENERIC_CODETAG_LDS_H */ |