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powerpc/mm: Abstraction for switch_mmu_context()

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How we switch MMU context differs between hash and radix. For hash we
need to switch the SLB details and for radix we need to switch the PID
SPR.

Signed-off-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
This commit is contained in:
Aneesh Kumar K.V 2016-04-29 23:26:01 +10:00 • committed by Michael Ellerman
commit d2adba3fd1
5 changed files with 19 additions and 17 deletions
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drivers/cpufreq/pmac32-cpufreq.c
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@ -298,7 +298,7 @@ static int pmu_set_cpu_speed(int low_speed)
_set_L3CR(save_l3cr);
/* Restore userland MMU context */
switch_mmu_context(NULL, current->active_mm);
switch_mmu_context(NULL, current->active_mm, NULL);
#ifdef DEBUG_FREQ
printk(KERN_DEBUG "HID1, after: %x\n", mfspr(SPRN_HID1));