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authorAndy Lutomirski <luto@kernel.org>2017-09-06 19:54:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-06 20:12:57 -0700
commit1c9fe4409ce3e9c78b1ed96ee8ed699d4f03bf33 (patch)
treeb0a9e9d2d4a7062dc6f20c463109af14e56c9c7e /fs/sync.c
parent72c0098d92cedb11c7e0151e84918840a4e96b31 (diff)
x86/mm: Document how CR4.PCIDE restore works
While debugging a problem, I thought that using cr4_set_bits_and_update_boot() to restore CR4.PCIDE would be helpful. It turns out to be counterproductive. Add a comment documenting how this works. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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