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| author | Guenter Roeck <linux@roeck-us.net> | 2021-09-14 20:52:24 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-06 15:05:06 +0200 |
| commit | 9e067d4780c3953a6c7338fa32252ed002bcdcf3 (patch) | |
| tree | 0746a1d01d3efafddbc201e81e47ef669a83e7ab /include | |
| parent | c5d5a43dd2b649a0a290bfed00fb76d1aff89be6 (diff) | |
| download | linux-stable-9e067d4780c3953a6c7338fa32252ed002bcdcf3.tar.gz linux-stable-9e067d4780c3953a6c7338fa32252ed002bcdcf3.tar.bz2 linux-stable-9e067d4780c3953a6c7338fa32252ed002bcdcf3.zip | |
compiler.h: Introduce absolute_pointer macro
[ Upstream commit f6b5f1a56987de837f8e25cd560847106b8632a8 ]
absolute_pointer() disassociates a pointer from its originating symbol
type and context. Use it to prevent compiler warnings/errors such as
drivers/net/ethernet/i825xx/82596.c: In function 'i82596_probe':
arch/m68k/include/asm/string.h:72:25: error:
'__builtin_memcpy' reading 6 bytes from a region of size 0 [-Werror=stringop-overread]
Such warnings may be reported by gcc 11.x for string and memory
operations on fixed addresses.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/compiler.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 3b6e6522e0ec..d29b68379223 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -152,6 +152,8 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, (typeof(ptr)) (__ptr + (off)); }) #endif +#define absolute_pointer(val) RELOC_HIDE((void *)(val), 0) + #ifndef OPTIMIZER_HIDE_VAR #define OPTIMIZER_HIDE_VAR(var) barrier() #endif |