From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752512AbbIFKKU (ORCPT ); Sun, 6 Sep 2015 06:10:20 -0400 Received: from andre.telenet-ops.be ([195.130.132.53]:57452 "EHLO andre.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751247AbbIFKKO (ORCPT ); Sun, 6 Sep 2015 06:10:14 -0400 From: Geert Uytterhoeven To: Andrea Arcangeli , Andrew Morton Cc: linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH] selftests/userfaultfd: Fix compiler warnings on 32-bit Date: Sun, 6 Sep 2015 12:10:16 +0200 Message-Id: <1441534216-24558-1-git-send-email-geert@linux-m68k.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- tools/testing/selftests/vm/userfaultfd.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 0c0b8395335261b9..b619f672131ea787 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/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)++; -- 1.9.1