]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
compiler.h: Introduce absolute_pointer macro
authorGuenter Roeck <linux@roeck-us.net>
Wed, 15 Sep 2021 03:52:24 +0000 (20:52 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 15 Sep 2021 19:04:28 +0000 (12:04 -0700)
commitf6b5f1a56987de837f8e25cd560847106b8632a8
tree8262f1ff6c316c9177612934d36bb822a55530bd
parent6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f
compiler.h: Introduce absolute_pointer macro

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>
include/linux/compiler.h