linux-kernel - [PATCH v1 3/8] powerpc/mem: Call flush_coherent

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Date:   Wed,  7 Apr 2021 17:22:36 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 3/8] powerpc/mem: Call flush_coherent_icache() at higher
 level

flush_coherent_icache() doesn't need the address anymore,
so it can be called immediately when entering the public
functions and doesn't need to be disseminated among
lower level functions.

And use page_to_phys() instead of open coding the calculation
of phys address to call flush_dcache_icache_phys().

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/mm/mem.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 19f807b87697..29ce215e491f 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -491,6 +491,8 @@ static void flush_dcache_icache_hugepage(struct page *page)
 
 void flush_dcache_icache_page(struct page *page)
 {
+	if (flush_coherent_icache())
+		return;
 
 	if (PageCompound(page))
 		return flush_dcache_icache_hugepage(page);
@@ -504,11 +506,7 @@ void flush_dcache_icache_page(struct page *page)
 		__flush_dcache_icache(start);
 		kunmap_atomic(start);
 	} else {
-		unsigned long addr = page_to_pfn(page) << PAGE_SHIFT;
-
-		if (flush_coherent_icache())
-			return;
-		flush_dcache_icache_phys(addr);
+		flush_dcache_icache_phys(page_to_phys(page));
 	}
 #endif
 }
@@ -525,9 +523,6 @@ static void __flush_dcache_icache(void *p)
 {
 	unsigned long addr = (unsigned long)p;
 
-	if (flush_coherent_icache())
-		return;
-
 	clean_dcache_range(addr, addr + PAGE_SIZE);
 
 	/*
-- 
2.25.0