From d8ed45c5dcd455fc5848d47f86883a1b872ac0d0 Mon Sep 17 00:00:00 2001 From: Michel Lespinasse Date: Mon, 8 Jun 2020 21:33:25 -0700 Subject: mmap locking API: use coccinelle to convert mmap_sem rwsem call sites This change converts the existing mmap_sem rwsem calls to use the new mmap locking API instead. The change is generated using coccinelle with the following rule: // spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir . @@ expression mm; @@ ( -init_rwsem +mmap_init_lock | -down_write +mmap_write_lock | -down_write_killable +mmap_write_lock_killable | -down_write_trylock +mmap_write_trylock | -up_write +mmap_write_unlock | -downgrade_write +mmap_write_downgrade | -down_read +mmap_read_lock | -down_read_killable +mmap_read_lock_killable | -down_read_trylock +mmap_read_trylock | -up_read +mmap_read_unlock ) -(&mm->mmap_sem) +(mm) Signed-off-by: Michel Lespinasse Signed-off-by: Andrew Morton Reviewed-by: Daniel Jordan Reviewed-by: Laurent Dufour Reviewed-by: Vlastimil Babka Cc: Davidlohr Bueso Cc: David Rientjes Cc: Hugh Dickins Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: John Hubbard Cc: Liam Howlett Cc: Matthew Wilcox Cc: Peter Zijlstra Cc: Ying Han Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds --- mm/mincore.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'mm/mincore.c') diff --git a/mm/mincore.c b/mm/mincore.c index de3e9fa5e458..453ff112470f 100644 --- a/mm/mincore.c +++ b/mm/mincore.c @@ -284,9 +284,9 @@ SYSCALL_DEFINE3(mincore, unsigned long, start, size_t, len, * Do at most PAGE_SIZE entries per iteration, due to * the temporary buffer size. */ - down_read(¤t->mm->mmap_sem); + mmap_read_lock(current->mm); retval = do_mincore(start, min(pages, PAGE_SIZE), tmp); - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); if (retval <= 0) break; -- cgit v1.2.3