linux-kernel - [PATCH 1/8] x86/mm/cpa: Use flush_tlb

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Date:   Wed, 19 Sep 2018 10:50:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Bin Yang <bin.yang@...el.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Mark Gross <mark.gross@...el.com>
Subject: [PATCH 1/8] x86/mm/cpa: Use flush_tlb_all()

Instead of open-coding it..

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 arch/x86/mm/pageattr.c |   12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -285,16 +285,6 @@ static void cpa_flush_all(unsigned long
 	on_each_cpu(__cpa_flush_all, (void *) cache, 1);
 }
 
-static void __cpa_flush_range(void *arg)
-{
-	/*
-	 * We could optimize that further and do individual per page
-	 * tlb invalidates for a low number of pages. Caveat: we must
-	 * flush the high aliases on 64bit as well.
-	 */
-	__flush_tlb_all();
-}
-
 static void cpa_flush_range(unsigned long start, int numpages, int cache)
 {
 	unsigned int i, level;
@@ -303,7 +293,7 @@ static void cpa_flush_range(unsigned lon
 	BUG_ON(irqs_disabled() && !early_boot_irqs_disabled);
 	WARN_ON(PAGE_ALIGN(start) != start);
 
-	on_each_cpu(__cpa_flush_range, NULL, 1);
+	flush_tlb_all();
 
 	if (!cache)
 		return;