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selftests/userfaultfd: fix compiler warnings on 32-bit

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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@linux-m68k.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven 2015-09-08 14:58:25 -07:00 committed by Linus Torvalds
parent 61e57c0c3a
commit af8713b701
1 changed files with 6 additions and 3 deletions
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9
tools/testing/selftests/vm/userfaultfd.c
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@ -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)++;