linux-kernel - [PATCH 07/10] mm: pagewalk: kill check for hugetlbfs inside /proc pagemap code

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Message-Id: <20140602213653.4520DC58@viggo.jf.intel.com>
Date:	Mon, 02 Jun 2014 14:36:53 -0700
From:	Dave Hansen <dave@...1.net>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mm@...ck.org, kirill.shutemov@...ux.intel.com,
	Dave Hansen <dave@...1.net>
Subject: [PATCH 07/10] mm: pagewalk: kill check for hugetlbfs inside /proc pagemap code


From: Dave Hansen <dave.hansen@...ux.intel.com>

The page map code does not call the normal handlers for hugetlbfs
areas.  They are handled by ->hugetlb_entry exclusively, so
remove the check for it.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
---

 b/fs/proc/task_mmu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff -puN fs/proc/task_mmu.c~do-not-check-for-hugetlbfs-inside-pagemap-walker fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~do-not-check-for-hugetlbfs-inside-pagemap-walker	2014-06-02 14:20:20.693870160 -0700
+++ b/fs/proc/task_mmu.c	2014-06-02 14:20:20.697870340 -0700
@@ -1033,8 +1033,7 @@ static int pagemap_pte_range(pmd_t *pmd,
 
 		/* check that 'vma' actually covers this address,
 		 * and that it isn't a huge page vma */
-		if (vma && (vma->vm_start <= addr) &&
-		    !is_vm_hugetlb_page(vma)) {
+		if (vma && (vma->vm_start <= addr)) {
 			pte = pte_offset_map(pmd, addr);
 			pte_to_pagemap_entry(&pme, pm, vma, addr, *pte);
 			/* unmap before userspace copy */
_
--
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