[RFC,PKS/PMEM,54/58] powerpc: Utilize new kmap_thread()

Commit Message

Ira Weiny Oct. 9, 2020, 7:50 p.m. UTC

From: Ira Weiny <[e-mail]>

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 <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Signed-off-by: Ira Weiny <[e-mail]>
---
 arch/powerpc/mm/mem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

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);
 }
 
 /*