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authorPeng Zhang <zhangpeng.00@bytedance.com>2023-10-27 06:38:37 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-12-11 03:51:31 +0300
commitb2472efe4316b2687c153919c1513a098bd82c17 (patch)
tree294a25397bf9258c4452558a01b8665d5b80ac25 /tools/include
parent4f2267b58a22d972be98edef8e6b3c7a67c9fb91 (diff)
downloadlinux-b2472efe4316b2687c153919c1513a098bd82c17.tar.xz
maple_tree: introduce {mtree,mas}_lock_nested()
In some cases, nested locks may be needed, so {mtree,mas}_lock_nested is introduced. For example, when duplicating maple tree, we need to hold the locks of two trees, in which case nested locks are needed. At the same time, add the definition of spin_lock_nested() in tools for testing. Link: https://lkml.kernel.org/r/20231027033845.90608-3-zhangpeng.00@bytedance.com Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Christian Brauner <brauner@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mateusz Guzik <mjguzik@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Mike Christie <michael.christie@oracle.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suren Baghdasaryan <surenb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/linux/spinlock.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/include/linux/spinlock.h b/tools/include/linux/spinlock.h
index 622266b197d0..a6cdf25b6b9d 100644
--- a/tools/include/linux/spinlock.h
+++ b/tools/include/linux/spinlock.h
@@ -11,6 +11,7 @@
#define spin_lock_init(x) pthread_mutex_init(x, NULL)
#define spin_lock(x) pthread_mutex_lock(x)
+#define spin_lock_nested(x, subclass) pthread_mutex_lock(x)
#define spin_unlock(x) pthread_mutex_unlock(x)
#define spin_lock_bh(x) pthread_mutex_lock(x)
#define spin_unlock_bh(x) pthread_mutex_unlock(x)