diff options
| author | Stefan Agner <[email protected]> | 2018-06-07 17:06:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-06-07 17:34:35 -0700 |
| commit | 1c4bc43ddfd52cbe5a08bb86ae636f55d2799424 (patch) | |
| tree | a1906e4a78501f342ac493dbda67b8f83c6b8773 /include/linux/kernel.h | |
| parent | 00b3a331fdf7f1466ac93a008ccd2dab45cb46c5 (diff) | |
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/[email protected]
Signed-off-by: Stefan Agner <[email protected]>
Suggested-by: Linus Torvalds <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Pavel Tatashin <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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)) |