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 --- arch/um/include/asm/mmu_context.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/um/include/asm/mmu_context.h') diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h index b4deb1bfbb68..62262c5c7785 100644 --- a/arch/um/include/asm/mmu_context.h +++ b/arch/um/include/asm/mmu_context.h @@ -49,7 +49,7 @@ static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) __switch_mm(&new->context.id); down_write_nested(&new->mmap_sem, 1); uml_setup_stubs(new); - up_write(&new->mmap_sem); + mmap_write_unlock(new); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, -- cgit v1.2.3