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| author | Stefan Agner <stefan@agner.ch> | 2018-06-08 03:06:15 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-08 03:34:35 +0300 |
| commit | 1c4bc43ddfd52cbe5a08bb86ae636f55d2799424 (patch) | |
| tree | a1906e4a78501f342ac493dbda67b8f83c6b8773 /include/linux/kernel.h | |
| parent | 00b3a331fdf7f1466ac93a008ccd2dab45cb46c5 (diff) | |
| download | linux-1c4bc43ddfd52cbe5a08bb86ae636f55d2799424.tar.xz | |
mm/memblock: introduce PHYS_ADDR_MAX
So far code was using ULLONG_MAX and type casting to obtain a
phys_addr_t with all bits set. The typecast is necessary to silence
compiler warnings on 32-bit platforms.
Use the simpler but still type safe approach "~(phys_addr_t)0" to create a
preprocessor define for all bits set.
Link: http://lkml.kernel.org/r/20180406213809.566-1-stefan@agner.ch
Signed-off-by: Stefan Agner <stefan@agner.ch>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 7aed92624531..7c4e8f1f72d8 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -29,6 +29,7 @@ #define LLONG_MIN (-LLONG_MAX - 1) #define ULLONG_MAX (~0ULL) #define SIZE_MAX (~(size_t)0) +#define PHYS_ADDR_MAX (~(phys_addr_t)0) #define U8_MAX ((u8)~0U) #define S8_MAX ((s8)(U8_MAX>>1)) |