From: Catalin Marinas <catalin.marinas@arm.com>
Date: Mon, 13 Sep 2010 14:57:05 +0000 (+0100)
Subject: ARM: 6378/1: Allow lazy cache flushing via PG_arch_1 for highmem pages
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0fc73099dd25df2c5181b7bad57d1faa5cd12d3c;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

ARM: 6378/1: Allow lazy cache flushing via PG_arch_1 for highmem pages

Commit d73cd42 forced non-lazy cache flushing of highmem pages in
flush_dcache_page(). This isn't needed since __flush_dcache_page()
(called lazily from update_mmu_cache) can handle highmem pages (fixed by
commit 7e5a69e).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index c6844cb9b50..87dd5ffdfa2 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -247,7 +247,7 @@ void flush_dcache_page(struct page *page)
 	mapping = page_mapping(page);
 
 #ifndef CONFIG_SMP
-	if (!PageHighMem(page) && mapping && !mapping_mapped(mapping))
+	if (mapping && !mapping_mapped(mapping))
 		set_bit(PG_dcache_dirty, &page->flags);
 	else
 #endif