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| author | Noam Camus <noamc@ezchip.com> | 2014-09-07 22:52:33 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-05-09 09:32:32 +0530 |
| commit | 15ca68a993d10767c37793e6a0a780b0a7e395dd (patch) | |
| tree | 42d9bb23a922629405b2ad49bb1304f421f31ab0 /arch/arc/include/asm/pgtable.h | |
| parent | 4bb40c6d6c011dc616d6d7fbad2bce21794f97a0 (diff) | |
| download | linux-15ca68a993d10767c37793e6a0a780b0a7e395dd.tar.bz2 | |
ARC: Make vmalloc size configurable
On ARC, lower 2G of address space is translated and used for
- user vaddr space (region 0 to 5)
- unused kernel-user gutter (region 6)
- kernel vaddr space (region 7)
where each region simply represents 256MB of address space.
The kernel vaddr space of 256MB is used to implement vmalloc, modules
So far this was enough, but not on EZChip system with 4K CPUs (given
that per cpu mechanism uses vmalloc for allocating chunks)
So allow VMALLOC_SIZE to be configurable by expanding down into the unused
kernel-user gutter region which at default 256M was excessive anyways.
Also use _BITUL() to fix a build error since PGDIR_SIZE cannot use "1UL"
as called from assembly code in mm/tlbex.S
Signed-off-by: Noam Camus <noamc@ezchip.com>
[vgupta: rewrote changelog, debugged bootup crash due to int vs. hex]
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/pgtable.h')
| -rw-r--r-- | arch/arc/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h index 10d4b8b8e545..034bbdc0ff61 100644 --- a/arch/arc/include/asm/pgtable.h +++ b/arch/arc/include/asm/pgtable.h @@ -217,7 +217,7 @@ #define BITS_FOR_PTE (PGDIR_SHIFT - PAGE_SHIFT) #define BITS_FOR_PGD (32 - PGDIR_SHIFT) -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) /* vaddr span, not PDG sz */ +#define PGDIR_SIZE _BITUL(PGDIR_SHIFT) /* vaddr span, not PDG sz */ #define PGDIR_MASK (~(PGDIR_SIZE-1)) #define PTRS_PER_PTE _BITUL(BITS_FOR_PTE) |