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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-12-01 02:54:19 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-01 03:32:52 +0300
commit5cbc198ae08d84bd416b672ad8bd1222acd0855c (patch)
tree985d1c3e96076aaca0f485d26f04b9957f920013 /samples/bpf/trace_output_kern.c
parent828347f8f9a558cf1af2faa46387a26564f2ac3e (diff)
downloadlinux-5cbc198ae08d84bd416b672ad8bd1222acd0855c.tar.xz
mm: fix false-positive WARN_ON() in truncate/invalidate for hugetlb
Hugetlb pages have ->index in size of the huge pages (PMD_SIZE or PUD_SIZE), not in PAGE_SIZE as other types of pages. This means we cannot user page_to_pgoff() to check whether we've got the right page for the radix-tree index. Let's introduce page_to_index() which would return radix-tree index for given page. We will be able to get rid of this once hugetlb will be switched to multi-order entries. Fixes: fc127da085c2 ("truncate: handle file thp") Link: http://lkml.kernel.org/r/20161123093053.mjbnvn5zwxw5e6lk@black.fi.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Doug Nelson <doug.nelson@intel.com> Tested-by: Doug Nelson <doug.nelson@intel.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: <stable@vger.kernel.org> [4.8+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'samples/bpf/trace_output_kern.c')
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