From: Bartosz Golaszewski <brgl@bgdev.pl>
To: "Joel Becker" <jlbec@evilplan.org>,
"Christoph Hellwig" <hch@lst.de>, "Shuah Khan" <shuah@kernel.org>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Kent Gibson" <warthog618@gmail.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v5 07/11] lib: bitmap: provide devm_bitmap_alloc() and devm_bitmap_zalloc()
Date: Mon, 15 Mar 2021 10:13:56 +0100 [thread overview]
Message-ID: <20210315091400.13772-8-brgl@bgdev.pl> (raw)
In-Reply-To: <20210315091400.13772-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Provide managed variants of bitmap_alloc() and bitmap_zalloc().
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
include/linux/bitmap.h | 8 ++++++++
lib/bitmap.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 3282db97e06c..73d039476fa4 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -9,6 +9,8 @@
#include <linux/string.h>
#include <linux/types.h>
+struct device;
+
/*
* bitmaps provide bit arrays that consume one or more unsigned
* longs. The bitmap interface and available operations are listed
@@ -122,6 +124,12 @@ unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags);
unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags);
void bitmap_free(const unsigned long *bitmap);
+/* Managed variants of the above. */
+unsigned long *devm_bitmap_alloc(struct device *dev,
+ unsigned int nbits, gfp_t flags);
+unsigned long *devm_bitmap_zalloc(struct device *dev,
+ unsigned int nbits, gfp_t flags);
+
/*
* lib/bitmap.c provides these functions:
*/
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 78f70d9007ad..27e08c0e547e 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -8,6 +8,7 @@
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/ctype.h>
+#include <linux/device.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/kernel.h>
@@ -1263,6 +1264,38 @@ void bitmap_free(const unsigned long *bitmap)
}
EXPORT_SYMBOL(bitmap_free);
+static void devm_bitmap_free(void *data)
+{
+ unsigned long *bitmap = data;
+
+ bitmap_free(bitmap);
+}
+
+unsigned long *devm_bitmap_alloc(struct device *dev,
+ unsigned int nbits, gfp_t flags)
+{
+ unsigned long *bitmap;
+ int ret;
+
+ bitmap = bitmap_alloc(nbits, flags);
+ if (!bitmap)
+ return NULL;
+
+ ret = devm_add_action_or_reset(dev, devm_bitmap_free, bitmap);
+ if (ret)
+ return NULL;
+
+ return bitmap;
+}
+EXPORT_SYMBOL_GPL(devm_bitmap_alloc);
+
+unsigned long *devm_bitmap_zalloc(struct device *dev,
+ unsigned int nbits, gfp_t flags)
+{
+ return devm_bitmap_alloc(dev, nbits, flags | __GFP_ZERO);
+}
+EXPORT_SYMBOL_GPL(devm_bitmap_zalloc);
+
#if BITS_PER_LONG == 64
/**
* bitmap_from_arr32 - copy the contents of u32 array of bits to bitmap
--
2.30.1
next prev parent reply other threads:[~2021-03-15 9:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 9:13 [PATCH v5 00/11] gpio: implement the configfs testing module Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 01/11] configfs: increase the item name length Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 02/11] configfs: use (1UL << bit) for internal flags Bartosz Golaszewski
2021-03-15 15:31 ` David Laight
2021-03-15 16:36 ` Andy Shevchenko
2021-03-15 9:13 ` [PATCH v5 03/11] configfs: implement committable items Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 04/11] samples: configfs: add a committable group Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 05/11] lib: bitmap: remove the 'extern' keyword from function declarations Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 06/11] lib: bitmap: order includes alphabetically Bartosz Golaszewski
2021-03-15 9:13 ` Bartosz Golaszewski [this message]
2021-03-15 9:13 ` [PATCH v5 08/11] gpio: sim: new testing module Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 09/11] selftests: gpio: provide a helper for reading chip info Bartosz Golaszewski
2021-03-15 9:13 ` [PATCH v5 10/11] selftests: gpio: add a helper for reading GPIO line names Bartosz Golaszewski
2021-03-15 9:14 ` [PATCH v5 11/11] selftests: gpio: add test cases for gpio-sim Bartosz Golaszewski
2021-03-22 14:32 ` [PATCH v5 00/11] gpio: implement the configfs testing module Bartosz Golaszewski
2021-03-23 16:17 ` Andy Shevchenko
2021-03-25 9:29 ` Linus Walleij
2021-03-26 14:00 ` Bartosz Golaszewski
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