linux

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Vineet Gupta 3daa48d1d9 ARC: [ASID] get_new_mmu_context() to conditionally allocate new ASID

ASID allocation changes/1

This patch does 2 things:

(1) get_new_mmu_context() NOW moves mm->ASID to a new value ONLY if it
    was from a prev allocation cycle/generation OR if mm had no ASID
    allocated (vs. before would unconditionally moving to a new ASID)

    Callers desiring unconditional update of ASID, e.g.local_flush_tlb_mm()
    (for parent's address space invalidation at fork) need to first force
    the parent to an unallocated ASID.

(2) get_new_mmu_context() always sets the MMU PID reg with unchanged/new
    ASID value.

The gains are:
- consolidation of all asid alloc logic into get_new_mmu_context()
- avoiding code duplication in switch_mm() for PID reg setting
- Enables future change to fold activate_mm() into switch_mm()

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

2013-08-30 21:42:18 +05:30

boot

ARC: Add some .gitignore entries

2013-08-26 09:40:24 +05:30

configs

Couple of Platform updates (Device Tree files primarily) given that the

2013-07-10 10:11:26 -07:00

include

ARC: [ASID] get_new_mmu_context() to conditionally allocate new ASID

2013-08-30 21:42:18 +05:30

kernel

ARC: Entry Handler tweaks: Optimize away redundant IRQ_DISABLE_SAVE