Fix a regression caused by Commit 7fc34a62ca mm/msync.c: sync only the requested range in msync(). xfstests generic/075 fail occured on ext4 data=journal mode because the intended range was not syncing due to wrong fstart calculation. Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx> Cc: Lukáš Czerner <lczerner@xxxxxxxxxx> Reported-by: Eric Whitney <enwlinux@xxxxxxxxx> Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> Signed-off-by: Ashish Sangwan <a.sangwan@xxxxxxxxxxx> --- mm/msync.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/msync.c b/mm/msync.c index a5c6736..ad97dce 100644 --- a/mm/msync.c +++ b/mm/msync.c @@ -78,7 +78,8 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags) goto out_unlock; } file = vma->vm_file; - fstart = start + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); + fstart = (start - vma->vm_start) + + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); fend = fstart + (min(end, vma->vm_end) - start) - 1; start = vma->vm_end; if ((flags & MS_SYNC) && file && -- 1.7.11-rc0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href