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Commit 48bdcace authored by Christophe Leroy's avatar Christophe Leroy Committed by Michael Ellerman
Browse files

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: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 8820a447

arch/powerpc/mm/mmu_context_nohash.c

+4 −9
Original line number Diff line number Diff line
@@ -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;