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authorChristoph Hellwig <hch@lst.de>2019-07-11 20:56:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-12 11:05:44 -0700
commitf455c854877dcce5d714b00203ea804bf601fb02 (patch)
treeb341568c4b917e6ff247e0602aa6d8dea8d8c14f
parentfcf8a1e483490cd249df4e02d5425636c3f43c86 (diff)
mm: use untagged_addr() for get_user_pages_fast addresses
Patch series "switch the remaining architectures to use generic GUP", v4. A series to switch mips, sh and sparc64 to use the generic GUP code so that we only have one codebase to touch for further improvements to this code. This patch (of 16): This will allow sparc64, or any future architecture with memory tagging to override its tags for get_user_pages and get_user_pages_fast. Link: http://lkml.kernel.org/r/20190625143715.1689-2-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Cc: Paul Burton <paul.burton@mips.com> Cc: James Hogan <jhogan@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: David Miller <davem@davemloft.net> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/gup.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/gup.c b/mm/gup.c
index f1c1daebc425..fc704dc37914 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;