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| author |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 10:45:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 10:45:23 -0700 |
| commit | 02b2318e07f98a7cdf7089a4457a8d62424aa824 (patch) | |
| tree | b40353a9ee6b034e21192ceb5df445fbc5fbdd32 /include/asm-sparc64/mmu_context.h | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6 (diff) | |
| parent | [SPARC64]: Fix UP build. (diff) | |
| download | linux-dev-02b2318e07f98a7cdf7089a4457a8d62424aa824.tar.xz linux-dev-02b2318e07f98a7cdf7089a4457a8d62424aa824.zip | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: (26 commits)
[SPARC64]: Fix UP build.
[SPARC64]: dr-cpu unconfigure support.
[SERIAL]: Fix console write locking in sparc drivers.
[SPARC64]: Give more accurate errors in dr_cpu_configure().
[SPARC64]: Clear cpu_{core,sibling}_map[] in smp_fill_in_sib_core_maps()
[SPARC64]: Fix leak when DR added cpu does not bootup.
[SPARC64]: Add ->set_affinity IRQ handlers.
[SPARC64]: Process dr-cpu events in a kthread instead of workqueue.
[SPARC64]: More sensible udelay implementation.
[SPARC64]: SMP build fixes.
[SPARC64]: mdesc.c needs linux/mm.h
[SPARC64]: Fix build regressions added by dr-cpu changes.
[SPARC64]: Unconditionally register vio_bus_type.
[SPARC64]: Initial LDOM cpu hotplug support.
[SPARC64]: Fix setting of variables in LDOM guest.
[SPARC64]: Fix MD property lifetime bugs.
[SPARC64]: Abstract out mdesc accesses for better MD update handling.
[SPARC64]: Use more mearningful names for IRQ registry.
[SPARC64]: Initial domain-services driver.
[SPARC64]: Export powerd facilities for external entities.
...
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) |