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| author | Paul Mackerras <paulus@samba.org> | 2006-06-29 16:16:15 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-06-29 16:16:15 +1000 |
| commit | 1729dc7833014eaba3520091a673dbdc9242d9f9 (patch) | |
| tree | a0d72d55ae7bf9c256d7e4ddfea9997a827896fb | |
| parent | 489244498ec99c949ecbd7105299066cff283dcd (diff) | |
| download | linux-1729dc7833014eaba3520091a673dbdc9242d9f9.tar.gz linux-1729dc7833014eaba3520091a673dbdc9242d9f9.tar.bz2 linux-1729dc7833014eaba3520091a673dbdc9242d9f9.zip | |
[POWERPC] Correct the MAX_CONTEXT definition
When we increased the address space per process to 2^44 bytes, the
number of contexts that we could actually use reduced, but we forgot
to decrease the MAX_CONTEXT definition. (Fortunately this would only
cause problems if we actually had more than 512k user processes
running.) This patch corrects the definition.
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | include/asm-powerpc/mmu_context.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/asm-powerpc/mmu_context.h b/include/asm-powerpc/mmu_context.h index 8c6b1a6d944f..083ac917bd29 100644 --- a/include/asm-powerpc/mmu_context.h +++ b/include/asm-powerpc/mmu_context.h @@ -25,8 +25,13 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, { } +/* + * The proto-VSID space has 2^35 - 1 segments available for user mappings. + * Each segment contains 2^28 bytes. Each context maps 2^44 bytes, + * so we can support 2^19-1 contexts (19 == 35 + 28 - 44). + */ #define NO_CONTEXT 0 -#define MAX_CONTEXT (0x100000-1) +#define MAX_CONTEXT ((1UL << 19) - 1) extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm); extern void destroy_context(struct mm_struct *mm); |