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authorMichel Lespinasse <walken@google.com>2020-06-09 07:33:25 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 19:39:14 +0300
commitd8ed45c5dcd455fc5848d47f86883a1b872ac0d0 (patch)
treef9270b32da5f3f7be73b086c99d3dfc29a13161a /arch/arm/mm/fault.c
parent0adf65f53aae86aa86d8dccada02890545de8938 (diff)
downloadlinux-d8ed45c5dcd455fc5848d47f86883a1b872ac0d0.tar.xz
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 <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/mm/fault.c')
-rw-r--r--arch/arm/mm/fault.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 6229e9d2da6e..8e56c43981b4 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -271,11 +271,11 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
* validly references user space from well defined areas of the code,
* we can bug out early if this is from code which shouldn't.
*/
- if (!down_read_trylock(&mm->mmap_sem)) {
+ if (!mmap_read_trylock(mm)) {
if (!user_mode(regs) && !search_exception_tables(regs->ARM_pc))
goto no_context;
retry:
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
} else {
/*
* The above down_read_trylock() might have succeeded in
@@ -325,7 +325,7 @@ retry:
}
}
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
/*
* Handle the "normal" case first - VM_FAULT_MAJOR