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| author | Andrew Morton <akpm@linux-foundation.org> | 2011-07-25 17:12:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 20:57:09 -0700 |
| commit | c9d8c3d0896bfa5b57531ecc41a85ffbc6d87dbe (patch) | |
| tree | 0de7519c20e066c820d37ff32be319745e7a2f8e | |
| parent | be8f684d73d8d916847e996bf69cef14352872c6 (diff) | |
| download | op-kernel-dev-c9d8c3d0896bfa5b57531ecc41a85ffbc6d87dbe.zip op-kernel-dev-c9d8c3d0896bfa5b57531ecc41a85ffbc6d87dbe.tar.gz | |
mm/memblock.c: avoid abuse of RED_INACTIVE
RED_INACTIVE is a slab thing, and reusing it for memblock was
inappropriate, because memblock is dealing with phys_addr_t's which have a
Kconfigurable sizeof().
Create a new poison type for this application. Fixes the sparse warning
warning: cast truncates bits from constant value (9f911029d74e35b becomes 9d74e35b)
Reported-by: H Hartley Sweeten <hartleys@visionengravers.com>
Tested-by: H Hartley Sweeten <hartleys@visionengravers.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/poison.h | 6 | ||||
| -rw-r--r-- | mm/memblock.c | 8 |
2 files changed, 10 insertions, 4 deletions
diff --git a/include/linux/poison.h b/include/linux/poison.h index 2110a81..79159de 100644 --- a/include/linux/poison.h +++ b/include/linux/poison.h @@ -40,6 +40,12 @@ #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ +#ifdef CONFIG_PHYS_ADDR_T_64BIT +#define MEMBLOCK_INACTIVE 0x3a84fb0144c9e71bULL +#else +#define MEMBLOCK_INACTIVE 0x44c9e71bUL +#endif + #define SLUB_RED_INACTIVE 0xbb #define SLUB_RED_ACTIVE 0xcc diff --git a/mm/memblock.c b/mm/memblock.c index a0562d1..ccbf973 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -758,9 +758,9 @@ void __init memblock_analyze(void) /* Check marker in the unused last array entry */ WARN_ON(memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS].base - != (phys_addr_t)RED_INACTIVE); + != MEMBLOCK_INACTIVE); WARN_ON(memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS].base - != (phys_addr_t)RED_INACTIVE); + != MEMBLOCK_INACTIVE); memblock.memory_size = 0; @@ -786,8 +786,8 @@ void __init memblock_init(void) memblock.reserved.max = INIT_MEMBLOCK_REGIONS; /* Write a marker in the unused last array entry */ - memblock.memory.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE; - memblock.reserved.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE; + memblock.memory.regions[INIT_MEMBLOCK_REGIONS].base = MEMBLOCK_INACTIVE; + memblock.reserved.regions[INIT_MEMBLOCK_REGIONS].base = MEMBLOCK_INACTIVE; /* Create a dummy zero size MEMBLOCK which will get coalesced away later. * This simplifies the memblock_add() code below... |
