linux-kernel - [PATCH] xarray: add guard definitions for xa

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Date: Wed, 28 Feb 2024 14:53:52 +0100
From: Michal Schmidt <mschmidt@...hat.com>
To: Matthew Wilcox <willy@...radead.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] xarray: add guard definitions for xa_lock

Add DEFINE_GUARD definitions so that xa_lock can be used with guard() or
scoped_guard().

Signed-off-by: Michal Schmidt <mschmidt@...hat.com>
---
 include/linux/xarray.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/linux/xarray.h b/include/linux/xarray.h
index cb571dfcf4b1..73a8fc0e830a 100644
--- a/include/linux/xarray.h
+++ b/include/linux/xarray.h
@@ -11,6 +11,7 @@
 
 #include <linux/bitmap.h>
 #include <linux/bug.h>
+#include <linux/cleanup.h>
 #include <linux/compiler.h>
 #include <linux/gfp.h>
 #include <linux/kconfig.h>
@@ -1883,4 +1884,19 @@ static inline void *xas_next(struct xa_state *xas)
 	return xa_entry(xas->xa, node, xas->xa_offset);
 }
 
+DEFINE_GUARD(xa_lock, struct xarray *,
+	     xa_lock(_T),
+	     xa_unlock(_T))
+DEFINE_GUARD(xa_lock_bh, struct xarray *,
+	     xa_lock_bh(_T),
+	     xa_unlock_bh(_T))
+DEFINE_GUARD(xa_lock_irq, struct xarray *,
+	     xa_lock_irq(_T),
+	     xa_unlock_irq(_T))
+DEFINE_GUARD_COND(xa_lock, _try, xa_trylock(_T))
+DEFINE_LOCK_GUARD_1(xa_lock_irqsave, struct xarray,
+		    xa_lock_irqsave(_T->lock, _T->flags),
+		    xa_unlock_irqrestore(_T->lock, _T->flags),
+		    unsigned long flags)
+
 #endif /* _LINUX_XARRAY_H */
-- 
2.43.2