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| author | David S. Miller <davem@sunset.davemloft.net> | 2007-07-16 12:49:40 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-16 13:05:32 +0200 |
| commit | e0204409df29fe1b7d18f81dfc3ae6f9d90e7a63 (patch) | |
| tree | 66f670c0f182d02185f2f3ea6bb7bb97c165ff3b /include/asm-sparc64/mmu_context.h | |
| parent | [SERIAL]: Fix console write locking in sparc drivers. (diff) | |
| download | linux-e0204409df29fe1b7d18f81dfc3ae6f9d90e7a63.tar.xz linux-e0204409df29fe1b7d18f81dfc3ae6f9d90e7a63.zip | |
[SPARC64]: dr-cpu unconfigure support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-sparc64/mmu_context.h')
| -rw-r--r-- | include/asm-sparc64/mmu_context.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-sparc64/mmu_context.h b/include/asm-sparc64/mmu_context.h index 8d129032013e..9fc225ed5500 100644 --- a/include/asm-sparc64/mmu_context.h +++ b/include/asm-sparc64/mmu_context.h @@ -76,6 +76,9 @@ static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, str unsigned long ctx_valid, flags; int cpu; + if (unlikely(mm == &init_mm)) + return; + spin_lock_irqsave(&mm->context.lock, flags); ctx_valid = CTX_VALID(mm->context); if (!ctx_valid) |