netdev - [PATCH RFC PKS/PMEM 54/58] powerpc: Utilize new kmap

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Message-Id: <20201009195033.3208459-55-ira.weiny@intel.com>
Date:   Fri,  9 Oct 2020 12:50:29 -0700
From:   ira.weiny@...el.com
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Ira Weiny <ira.weiny@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>, x86@...nel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
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Subject: [PATCH RFC PKS/PMEM 54/58] powerpc: Utilize new kmap_thread()

From: Ira Weiny <ira.weiny@...el.com>

These kmap() calls are localized to a single thread.  To avoid the over
head of global PKRS updates use the new kmap_thread() call.

Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
 arch/powerpc/mm/mem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 42e25874f5a8..6ef557b8dda6 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -573,9 +573,9 @@ void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
 {
 	unsigned long maddr;
 
-	maddr = (unsigned long) kmap(page) + (addr & ~PAGE_MASK);
+	maddr = (unsigned long) kmap_thread(page) + (addr & ~PAGE_MASK);
 	flush_icache_range(maddr, maddr + len);
-	kunmap(page);
+	kunmap_thread(page);
 }
 
 /*
-- 
2.28.0.rc0.12.gb6a658bd00c9