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authorMichel Lespinasse <walken@google.com>2020-06-09 07:33:40 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 19:39:14 +0300
commit14c3656b7284a8649496584869e8c6642ec1abbb (patch)
tree27854c76ef733aba0de346c422b95d68d215f818 /include/linux/mmap_lock.h
parent0cc55a0213a02b760ade1d4755fdccfbf7d3157e (diff)
downloadlinux-14c3656b7284a8649496584869e8c6642ec1abbb.tar.xz
mmap locking API: add MMAP_LOCK_INITIALIZER
Define a new initializer for the mmap locking api. Initially this just evaluates to __RWSEM_INITIALIZER as the API is defined as wrappers around rwsem. Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> 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/20200520052908.204642-9-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mmap_lock.h')
-rw-r--r--include/linux/mmap_lock.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index d1826ce42f00..acac1bf5ecd2 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -1,6 +1,9 @@
#ifndef _LINUX_MMAP_LOCK_H
#define _LINUX_MMAP_LOCK_H
+#define MMAP_LOCK_INITIALIZER(name) \
+ .mmap_sem = __RWSEM_INITIALIZER((name).mmap_sem),
+
static inline void mmap_init_lock(struct mm_struct *mm)
{
init_rwsem(&mm->mmap_sem);