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| author |   Dmitry Torokhov <dtor@insightbb.com> | 2007-05-01 00:24:54 -0400 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2007-05-01 00:24:54 -0400 |
| commit | bc95f3669f5e6f63cf0b84fe4922c3c6dd4aa775 (patch) | |
| tree | 427fcf2a7287c16d4b5aa6cbf494d59579a6a8b1 /arch/arm/mm/context.c | |
| parent | Input: cobalt_btns - convert to use polldev library (diff) | |
| parent | libata: honour host controllers that want just one host (diff) | |
| download | linux-dev-bc95f3669f5e6f63cf0b84fe4922c3c6dd4aa775.tar.xz linux-dev-bc95f3669f5e6f63cf0b84fe4922c3c6dd4aa775.zip | |
Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
drivers/usb/input/Makefile
drivers/usb/input/gtco.c
Diffstat (limited to 'arch/arm/mm/context.c')
| -rw-r--r-- | arch/arm/mm/context.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c index 79e800202424..9da43a0fdcdf 100644 --- a/arch/arm/mm/context.c +++ b/arch/arm/mm/context.c @@ -19,7 +19,8 @@ unsigned int cpu_last_asid = { 1 << ASID_BITS }; /* * We fork()ed a process, and we need a new context for the child * to run in. We reserve version 0 for initial tasks so we will - * always allocate an ASID. + * always allocate an ASID. The ASID 0 is reserved for the TTBR + * register changing sequence. */ void __init_new_context(struct task_struct *tsk, struct mm_struct *mm) { @@ -38,8 +39,15 @@ void __new_context(struct mm_struct *mm) * If we've used up all our ASIDs, we need * to start a new version and flush the TLB. */ - if ((asid & ~ASID_MASK) == 0) + if ((asid & ~ASID_MASK) == 0) { + asid = ++cpu_last_asid; + /* set the reserved ASID before flushing the TLB */ + asm("mcr p15, 0, %0, c13, c0, 1 @ set reserved context ID\n" + : + : "r" (0)); + isb(); flush_tlb_all(); + } mm->context.id = asid; } |