tree 04043448c9ada73ea98a6b573520e4b0c9ef8e14
parent 1d94330a437a573cfdf848f6743b1ed169242c8a
author Linus Torvalds <torvalds@linux-foundation.org> 1610140421 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1610822799 -0800

mm: fix clear_refs_write locking

Turning page table entries read-only requires the mmap_sem held for
writing.

So stop doing the odd games with turning things from read locks to write
locks and back.  Just get the write lock.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>