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authorMichel Lespinasse <walken@google.com>2020-06-08 21:33:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 09:39:14 -0700
commitd8ed45c5dcd455fc5848d47f86883a1b872ac0d0 (patch)
treef9270b32da5f3f7be73b086c99d3dfc29a13161a /mm/mprotect.c
parent0adf65f53aae86aa86d8dccada02890545de8938 (diff)
downloadlinux-d8ed45c5dcd455fc5848d47f86883a1b872ac0d0.tar.bz2
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 'mm/mprotect.c')
-rw-r--r--mm/mprotect.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 1eeb7b3cedf0..ee27e44a7e07 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -538,7 +538,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
reqprot = prot;
- if (down_write_killable(&current->mm->mmap_sem))
+ if (mmap_write_lock_killable(current->mm))
return -EINTR;
/*
@@ -628,7 +628,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
prot = reqprot;
}
out:
- up_write(&current->mm->mmap_sem);
+ mmap_write_unlock(current->mm);
return error;
}
@@ -658,7 +658,7 @@ SYSCALL_DEFINE2(pkey_alloc, unsigned long, flags, unsigned long, init_val)
if (init_val & ~PKEY_ACCESS_MASK)
return -EINVAL;
- down_write(&current->mm->mmap_sem);
+ mmap_write_lock(current->mm);
pkey = mm_pkey_alloc(current->mm);
ret = -ENOSPC;
@@ -672,7 +672,7 @@ SYSCALL_DEFINE2(pkey_alloc, unsigned long, flags, unsigned long, init_val)
}
ret = pkey;
out:
- up_write(&current->mm->mmap_sem);
+ mmap_write_unlock(current->mm);
return ret;
}
@@ -680,9 +680,9 @@ SYSCALL_DEFINE1(pkey_free, int, pkey)
{
int ret;
- down_write(&current->mm->mmap_sem);
+ mmap_write_lock(current->mm);
ret = mm_pkey_free(current->mm, pkey);
- up_write(&current->mm->mmap_sem);
+ mmap_write_unlock(current->mm);
/*
* We could provie warnings or errors if any VMA still