On Thu, Apr 08, 2021 at 04:34:20PM +0000, Liam Howlett wrote: > When the superuser flushes the entire cache, the mmap_read_lock() is not > taken, but mmap_read_unlock() is called. Add the missing > mmap_read_lock() call. > > Fixes: cd2567b6850b (m68k: call find_vma with the mmap_sem held in > sys_cacheflush()) > Signed-off-by: Liam R. Howlett <liam.howl...@oracle.com>
Reviewed-by: Matthew Wilcox (Oracle) <wi...@infradead.org> Although if it's been broken since 2014, maybe the ability of the superuser to flush the entire cache is not needed any more and can be removed?
