From: Andi Kleen <ak@suse.de>
Date: Fri, 29 Jul 2005 04:15:25 +0000 (-0700)
Subject: [PATCH] x86_64: Use for_each_cpu_mask for clustered IPI flush
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=74f0629397cb435e144ff47c48f3bc39e879f196;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

[PATCH] x86_64: Use for_each_cpu_mask for clustered IPI flush

Makes it slightly more efficient.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/include/asm-x86_64/ipi.h b/include/asm-x86_64/ipi.h
index d1841847ed89..5e166b9d3bde 100644
--- a/include/asm-x86_64/ipi.h
+++ b/include/asm-x86_64/ipi.h
@@ -82,30 +82,27 @@ static inline void send_IPI_mask_sequence(cpumask_t mask, int vector)
 	 */
 	local_irq_save(flags);
 
-	for (query_cpu = 0; query_cpu < NR_CPUS; ++query_cpu) {
-		if (cpu_isset(query_cpu, mask)) {
-
-			/*
-			 * Wait for idle.
-			 */
-			apic_wait_icr_idle();
-
-			/*
-			 * prepare target chip field
-			 */
-			cfg = __prepare_ICR2(x86_cpu_to_apicid[query_cpu]);
-			apic_write_around(APIC_ICR2, cfg);
-
-			/*
-			 * program the ICR
-			 */
-			cfg = __prepare_ICR(0, vector, APIC_DEST_PHYSICAL);
-
-			/*
-			 * Send the IPI. The write to APIC_ICR fires this off.
-			 */
-			apic_write_around(APIC_ICR, cfg);
-		}
+	for_each_cpu_mask(query_cpu, mask) {
+		/*
+		 * Wait for idle.
+		 */
+		apic_wait_icr_idle();
+
+		/*
+		 * prepare target chip field
+		 */
+		cfg = __prepare_ICR2(x86_cpu_to_apicid[query_cpu]);
+		apic_write_around(APIC_ICR2, cfg);
+
+		/*
+		 * program the ICR
+		 */
+		cfg = __prepare_ICR(0, vector, APIC_DEST_PHYSICAL);
+
+		/*
+		 * Send the IPI. The write to APIC_ICR fires this off.
+		 */
+		apic_write_around(APIC_ICR, cfg);
 	}
 	local_irq_restore(flags);
 }