Commit b237aded authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds

thp: prepare change_huge_pmd() for file thp

change_huge_pmd() has assert which is not relvant for file page.  For
shared mapping it's perfectly fine to have page table entry writable,
without explicit mkwrite.

Link: http://lkml.kernel.org/r/1466021202-61880-18-git-send-email-kirill.shutemov@linux.intel.comSigned-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 628d47ce
...@@ -1788,7 +1788,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, ...@@ -1788,7 +1788,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
entry = pmd_mkwrite(entry); entry = pmd_mkwrite(entry);
ret = HPAGE_PMD_NR; ret = HPAGE_PMD_NR;
set_pmd_at(mm, addr, pmd, entry); set_pmd_at(mm, addr, pmd, entry);
BUG_ON(!preserve_write && pmd_write(entry)); BUG_ON(vma_is_anonymous(vma) && !preserve_write &&
pmd_write(entry));
} }
spin_unlock(ptl); spin_unlock(ptl);
} }
......
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