All of lore.kernel.org
 help / color / mirror / Atom feed
From: Fengguang Wu <fengguang.wu@intel.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: kbuild-all@01.org, Andrew Morton <akpm@linux-foundation.org>,
	Linux Memory Management List <linux-mm@kvack.org>
Subject: [next:master 102/250] mm/gup.c:43:2: warning: right shift count >= width of type
Date: Fri, 25 Apr 2014 23:16:05 +0800	[thread overview]
Message-ID: <20140425151605.GC31117@localhost> (raw)

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   d397246adc001ee5235f32de10db112ad23175df
commit: 0d84be787c23f75dba61dca3390c6060ae50d26f [102/250] mm: move get_user_pages()-related code to separate file
config: make ARCH=parisc c8000_defconfig

All warnings:

   In file included from arch/parisc/include/asm/bitops.h:213:0,
                    from include/linux/bitops.h:33,
                    from include/linux/kernel.h:10,
                    from arch/parisc/include/asm/bug.h:4,
                    from include/linux/bug.h:4,
                    from include/linux/thread_info.h:11,
                    from include/asm-generic/preempt.h:4,
                    from arch/parisc/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:18,
                    from include/linux/spinlock.h:50,
                    from include/linux/mm_types.h:8,
                    from include/linux/hugetlb.h:4,
                    from mm/gup.c:1:
   include/asm-generic/bitops/__fls.h: In function '__fls':
   include/asm-generic/bitops/__fls.h:17:2: warning: left shift count >= width of type [enabled by default]
   include/asm-generic/bitops/__fls.h:19:3: warning: left shift count >= width of type [enabled by default]
   include/asm-generic/bitops/__fls.h:22:2: warning: left shift count >= width of type [enabled by default]
   include/asm-generic/bitops/__fls.h:26:2: warning: left shift count >= width of type [enabled by default]
   include/asm-generic/bitops/__fls.h:30:2: warning: left shift count >= width of type [enabled by default]
   include/asm-generic/bitops/__fls.h:34:2: warning: left shift count >= width of type [enabled by default]
   include/asm-generic/bitops/__fls.h:38:2: warning: left shift count >= width of type [enabled by default]
   In file included from mm/gup.c:1:0:
   include/linux/hugetlb.h: In function 'hugepages_supported':
   include/linux/hugetlb.h:468:9: error: 'HPAGE_SHIFT' undeclared (first use in this function)
   include/linux/hugetlb.h:468:9: note: each undeclared identifier is reported only once for each function it appears in
   mm/gup.c: In function 'follow_page_mask':
>> mm/gup.c:43:2: warning: right shift count >= width of type [enabled by default]
   mm/gup.c:163:3: error: implicit declaration of function 'trylock_page' [-Werror=implicit-function-declaration]
   mm/gup.c:172:4: error: implicit declaration of function 'unlock_page' [-Werror=implicit-function-declaration]
   mm/gup.c: In function '__get_user_pages':
>> mm/gup.c:307:5: warning: right shift count >= width of type [enabled by default]
>> mm/gup.c:309:5: warning: right shift count >= width of type [enabled by default]
   mm/gup.c:441:5: error: implicit declaration of function 'flush_anon_page' [-Werror=implicit-function-declaration]
   mm/gup.c:442:5: error: implicit declaration of function 'flush_dcache_page' [-Werror=implicit-function-declaration]
   mm/gup.c: In function 'get_dump_page':
   mm/gup.c:611:2: error: implicit declaration of function 'flush_cache_page' [-Werror=implicit-function-declaration]
   cc1: some warnings being treated as errors

vim +43 mm/gup.c

0d84be78 Kirill A. Shutemov 2014-04-23  @1  #include <linux/hugetlb.h>
0d84be78 Kirill A. Shutemov 2014-04-23   2  #include <linux/mm.h>
0d84be78 Kirill A. Shutemov 2014-04-23   3  #include <linux/rmap.h>
0d84be78 Kirill A. Shutemov 2014-04-23   4  #include <linux/swap.h>
0d84be78 Kirill A. Shutemov 2014-04-23   5  #include <linux/swapops.h>
0d84be78 Kirill A. Shutemov 2014-04-23   6  
0d84be78 Kirill A. Shutemov 2014-04-23   7  #include "internal.h"
0d84be78 Kirill A. Shutemov 2014-04-23   8  
0d84be78 Kirill A. Shutemov 2014-04-23   9  /**
0d84be78 Kirill A. Shutemov 2014-04-23  10   * follow_page_mask - look up a page descriptor from a user-virtual address
0d84be78 Kirill A. Shutemov 2014-04-23  11   * @vma: vm_area_struct mapping @address
0d84be78 Kirill A. Shutemov 2014-04-23  12   * @address: virtual address to look up
0d84be78 Kirill A. Shutemov 2014-04-23  13   * @flags: flags modifying lookup behaviour
0d84be78 Kirill A. Shutemov 2014-04-23  14   * @page_mask: on output, *page_mask is set according to the size of the page
0d84be78 Kirill A. Shutemov 2014-04-23  15   *
0d84be78 Kirill A. Shutemov 2014-04-23  16   * @flags can have FOLL_ flags set, defined in <linux/mm.h>
0d84be78 Kirill A. Shutemov 2014-04-23  17   *
0d84be78 Kirill A. Shutemov 2014-04-23  18   * Returns the mapped (struct page *), %NULL if no mapping exists, or
0d84be78 Kirill A. Shutemov 2014-04-23  19   * an error pointer if there is a mapping to something not represented
0d84be78 Kirill A. Shutemov 2014-04-23  20   * by a page descriptor (see also vm_normal_page()).
0d84be78 Kirill A. Shutemov 2014-04-23  21   */
0d84be78 Kirill A. Shutemov 2014-04-23  22  struct page *follow_page_mask(struct vm_area_struct *vma,
0d84be78 Kirill A. Shutemov 2014-04-23  23  			      unsigned long address, unsigned int flags,
0d84be78 Kirill A. Shutemov 2014-04-23  24  			      unsigned int *page_mask)
0d84be78 Kirill A. Shutemov 2014-04-23  25  {
0d84be78 Kirill A. Shutemov 2014-04-23  26  	pgd_t *pgd;
0d84be78 Kirill A. Shutemov 2014-04-23  27  	pud_t *pud;
0d84be78 Kirill A. Shutemov 2014-04-23  28  	pmd_t *pmd;
0d84be78 Kirill A. Shutemov 2014-04-23  29  	pte_t *ptep, pte;
0d84be78 Kirill A. Shutemov 2014-04-23  30  	spinlock_t *ptl;
0d84be78 Kirill A. Shutemov 2014-04-23  31  	struct page *page;
0d84be78 Kirill A. Shutemov 2014-04-23  32  	struct mm_struct *mm = vma->vm_mm;
0d84be78 Kirill A. Shutemov 2014-04-23  33  
0d84be78 Kirill A. Shutemov 2014-04-23  34  	*page_mask = 0;
0d84be78 Kirill A. Shutemov 2014-04-23  35  
0d84be78 Kirill A. Shutemov 2014-04-23  36  	page = follow_huge_addr(mm, address, flags & FOLL_WRITE);
0d84be78 Kirill A. Shutemov 2014-04-23  37  	if (!IS_ERR(page)) {
0d84be78 Kirill A. Shutemov 2014-04-23  38  		BUG_ON(flags & FOLL_GET);
0d84be78 Kirill A. Shutemov 2014-04-23  39  		goto out;
0d84be78 Kirill A. Shutemov 2014-04-23  40  	}
0d84be78 Kirill A. Shutemov 2014-04-23  41  
0d84be78 Kirill A. Shutemov 2014-04-23  42  	page = NULL;
0d84be78 Kirill A. Shutemov 2014-04-23 @43  	pgd = pgd_offset(mm, address);
0d84be78 Kirill A. Shutemov 2014-04-23  44  	if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
0d84be78 Kirill A. Shutemov 2014-04-23  45  		goto no_page_table;
0d84be78 Kirill A. Shutemov 2014-04-23  46  

---
0-DAY kernel build testing backend              Open Source Technology Center
http://lists.01.org/mailman/listinfo/kbuild                 Intel Corporation

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

                 reply	other threads:[~2014-04-25 15:16 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20140425151605.GC31117@localhost \
    --to=fengguang.wu@intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=kbuild-all@01.org \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=linux-mm@kvack.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.