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mm/rmap.c: remove redundant variable cend 

Variable cend is set but never read, hence it is redundant and can be
removed.

Cleans up clang build warning: Value stored to 'cend' is never read

Link: http://lkml.kernel.org/r/20171011174942.1372-1-colin.king@canonical.com
Fixes: 369ea8242c ("mm/rmap: update to new mmu_notifier semantic v2")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Colin Ian King 2017-11-15 17:35:47 -08:00 committed by Linus Torvalds
parent f3f7c09355
commit cdb07bdea2
1 changed files with 1 additions and 3 deletions
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4
mm/rmap.c
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@ -899,7 +899,7 @@ static bool page_mkclean_one(struct page *page, struct vm_area_struct *vma,
mmu_notifier_invalidate_range_start(vma->vm_mm, start, end); mmu_notifier_invalidate_range_start(vma->vm_mm, start, end);
while (page_vma_mapped_walk(&pvmw)) { while (page_vma_mapped_walk(&pvmw)) {
unsigned long cstart, cend; unsigned long cstart;
int ret = 0; int ret = 0;
cstart = address = pvmw.address; cstart = address = pvmw.address;
@ -915,7 +915,6 @@ static bool page_mkclean_one(struct page *page, struct vm_area_struct *vma,
entry = pte_wrprotect(entry); entry = pte_wrprotect(entry);
entry = pte_mkclean(entry); entry = pte_mkclean(entry);
set_pte_at(vma->vm_mm, address, pte, entry); set_pte_at(vma->vm_mm, address, pte, entry);
cend = cstart + PAGE_SIZE;
ret = 1; ret = 1;
} else { } else {
#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE #ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE
@ -931,7 +930,6 @@ static bool page_mkclean_one(struct page *page, struct vm_area_struct *vma,
entry = pmd_mkclean(entry); entry = pmd_mkclean(entry);
set_pmd_at(vma->vm_mm, address, pmd, entry); set_pmd_at(vma->vm_mm, address, pmd, entry);
cstart &= PMD_MASK; cstart &= PMD_MASK;
cend = cstart + PMD_SIZE;
ret = 1; ret = 1;
#else #else
/* unexpected pmd-mapped page? */ /* unexpected pmd-mapped page? */