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| author | Noam Camus <noamc@ezchip.com> | 2015-12-06 16:40:55 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-05-09 07:02:32 +0300 |
| commit | 8bcf2c48f32e22f923b69f779c95b1348308d5b1 (patch) | |
| tree | de985a3469686b3dfc5cb59c2c180c5ba53e6e44 /arch/arc/mm | |
| parent | 4a66d3fecf6554c4e1482774833da4f07cade787 (diff) | |
| download | linux-8bcf2c48f32e22f923b69f779c95b1348308d5b1.tar.xz | |
ARC: [plat-eznps] Use dedicated user stack top
NPS use special mapping right below TASK_SIZE.
Hence we need to lower STACK_TOP so that user stack won't
overlap NPS special mapping.
Signed-off-by: Noam Camus <noamc@ezchip.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/tlb.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 745a9aeb2d96..ec868a9081a1 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -819,6 +819,12 @@ void arc_mmu_init(void) */ BUILD_BUG_ON(!IS_ALIGNED((CONFIG_ARC_KVADDR_SIZE << 20), PMD_SIZE)); + /* + * stack top size sanity check, + * Can't be done in processor.h due to header include depenedencies + */ + BUILD_BUG_ON(!IS_ALIGNED(STACK_TOP, PMD_SIZE)); + /* For efficiency sake, kernel is compile time built for a MMU ver * This must match the hardware it is running on. * Linux built for MMU V2, if run on MMU V1 will break down because V1 |