[PATCH 01/16] mm: use untagged_addr() for get_user_pages_fast addresses
From: Christoph Hellwig <hch@lst.de>
Date: 2019-06-25 14:37:49
Also in:
linux-mips, linux-mm, linux-sh, lkml, sparclinux
Subsystem:
memory management, memory management - gup (get user pages), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
This will allow sparc64, or any future architecture with memory tagging to override its tags for get_user_pages and get_user_pages_fast. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Khalid Aziz <redacted> Reviewed-by: Jason Gunthorpe <redacted> --- mm/gup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
index ddde097cf9e4..6bb521db67ec 100644
--- a/mm/gup.c
+++ b/mm/gup.c@@ -2146,7 +2146,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, unsigned long flags; int nr = 0; - start &= PAGE_MASK; + start = untagged_addr(start) & PAGE_MASK; len = (unsigned long) nr_pages << PAGE_SHIFT; end = start + len;
@@ -2219,7 +2219,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, unsigned long addr, len, end; int nr = 0, ret = 0; - start &= PAGE_MASK; + start = untagged_addr(start) & PAGE_MASK; addr = start; len = (unsigned long) nr_pages << PAGE_SHIFT; end = start + len;
--
2.20.1