linux-kernel - [PATCH v2 1/4] bitmap: define a cleanup function for bitmaps

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Message-Id: <20230920075500.96260-2-brgl@bgdev.pl>
Date:   Wed, 20 Sep 2023 09:54:57 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Yury Norov <yury.norov@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v2 1/4] bitmap: define a cleanup function for bitmaps

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Add support for autopointers for bitmaps allocated with bitmap_alloc()
et al.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 include/linux/bitmap.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 03644237e1ef..6709807ebb59 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -6,6 +6,7 @@
 
 #include <linux/align.h>
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/find.h>
 #include <linux/limits.h>
 #include <linux/string.h>
@@ -125,6 +126,8 @@ unsigned long *bitmap_alloc_node(unsigned int nbits, gfp_t flags, int node);
 unsigned long *bitmap_zalloc_node(unsigned int nbits, gfp_t flags, int node);
 void bitmap_free(const unsigned long *bitmap);
 
+DEFINE_FREE(bitmap, unsigned long *, if (_T) bitmap_free(_T))
+
 /* Managed variants of the above. */
 unsigned long *devm_bitmap_alloc(struct device *dev,
 				 unsigned int nbits, gfp_t flags);
-- 
2.39.2