The patch titled
Subject: selftests/userfaultfd: fix compiler warnings on 32-bit
has been added to the -mm tree. Its filename is
selftests-userfaultfd-fix-compiler-warnings-on-32-bit.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/selftests-userfaultfd-fix-compiler-warnings-on-32-bit.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/selftests-userfaultfd-fix-compiler-warnings-on-32-bit.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Subject: selftests/userfaultfd: fix compiler warnings on 32-bit
On 32-bit:
userfaultfd.c: In function 'locking_thread':
userfaultfd.c:152: warning: left shift count >= width of type
userfaultfd.c: In function 'uffd_poll_thread':
userfaultfd.c:295: warning: cast to pointer from integer of different size
userfaultfd.c: In function 'uffd_read_thread':
userfaultfd.c:332: warning: cast to pointer from integer of different size
Fix the shift warning by splitting the shift in two parts, and the
integer/pointer warnigns by adding intermediate casts to "unsigned long".
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff -puN tools/testing/selftests/vm/userfaultfd.c~selftests-userfaultfd-fix-compiler-warnings-on-32-bit tools/testing/selftests/vm/userfaultfd.c
--- a/tools/testing/selftests/vm/userfaultfd.c~selftests-userfaultfd-fix-compiler-warnings-on-32-bit
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -147,7 +147,8 @@ static void *locking_thread(void *arg)
if (sizeof(page_nr) > sizeof(rand_nr)) {
if (random_r(&rand, &rand_nr))
fprintf(stderr, "random_r 2 error\n"), exit(1);
- page_nr |= ((unsigned long) rand_nr) << 32;
+ page_nr |= (((unsigned long) rand_nr) << 16) <<
+ 16;
}
} else
page_nr += 1;
@@ -290,7 +291,8 @@ static void *uffd_poll_thread(void *arg)
msg.event), exit(1);
if (msg.arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WRITE)
fprintf(stderr, "unexpected write fault\n"), exit(1);
- offset = (char *)msg.arg.pagefault.address - area_dst;
+ offset = (char *)(unsigned long)msg.arg.pagefault.address -
+ area_dst;
offset &= ~(page_size-1);
if (copy_page(offset))
userfaults++;
@@ -327,7 +329,8 @@ static void *uffd_read_thread(void *arg)
if (bounces & BOUNCE_VERIFY &&
msg.arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WRITE)
fprintf(stderr, "unexpected write fault\n"), exit(1);
- offset = (char *)msg.arg.pagefault.address - area_dst;
+ offset = (char *)(unsigned long)msg.arg.pagefault.address -
+ area_dst;
offset &= ~(page_size-1);
if (copy_page(offset))
(*this_cpu_userfaults)++;
_
Patches currently in -mm which might be from geert@xxxxxxxxxxxxxx are
selftests-userfaultfd-fix-compiler-warnings-on-32-bit.patch
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