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powerpc/mm: Avoid unnecessary test and reduce code size 

no_selective_tlbil hence the use of either steal_all_contexts()
or steal_context_up() depends on the subarch, it won't change
during run. Only the 8xx uses steal_all_contexts and CONFIG_PPC_8xx
is exclusive of other processors.

This patch replaces the test of no_selective_tlbil global var by
a test of CONFIG_PPC_8xx selection. It avoids the test and
removes unnecessary code.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Christophe Leroy 2018-03-21 15:07:49 +01:00 committed by Michael Ellerman
parent 8820a44738
commit 48bdcace59
1 changed files with 4 additions and 9 deletions
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13
arch/powerpc/mm/mmu_context_nohash.c
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@ -62,7 +62,6 @@ static unsigned long *context_map;
static unsigned long *stale_map[NR_CPUS];
static struct mm_struct **context_mm;
static DEFINE_RAW_SPINLOCK(context_lock);
static bool no_selective_tlbil;
#define CTX_MAP_SIZE \
(sizeof(unsigned long) * (last_context / BITS_PER_LONG + 1))
@ -279,7 +278,7 @@ void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next,
goto stolen;
}
#endif /* CONFIG_SMP */
if (no_selective_tlbil)
if (IS_ENABLED(CONFIG_PPC_8xx))
id = steal_all_contexts();
else
id = steal_context_up(id);
@ -440,16 +439,12 @@ void __init mmu_context_init(void)
* present if needed.
* -- BenH
*/
if (mmu_has_feature(MMU_FTR_TYPE_8xx)) {
if (mmu_has_feature(MMU_FTR_TYPE_8xx))
last_context = 16;
no_selective_tlbil = true;
} else if (mmu_has_feature(MMU_FTR_TYPE_47x)) {
else if (mmu_has_feature(MMU_FTR_TYPE_47x))
last_context = 65535;
no_selective_tlbil = false;
} else {
else
last_context = 255;
no_selective_tlbil = false;
}
#ifdef DEBUG_CLAMP_LAST_CONTEXT
last_context = DEBUG_CLAMP_LAST_CONTEXT;