From: James Clark <james.clark@arm.com>
To: linux-kernel@vger.kernel.org, linux@roeck-us.net,
michal.simek@amd.com, Jonathan.Cameron@huawei.com
Cc: James Clark <james.clark@arm.com>,
Jonathan Corbet <corbet@lwn.net>,
Jean Delvare <jdelvare@suse.com>,
Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com>,
Jonathan Cameron <jic23@kernel.org>,
Lars-Peter Clausen <lars@metafoo.de>,
Michal Simek <michal.simek@xilinx.com>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jirislaby@kernel.org>,
linux-doc@vger.kernel.org, linux-hwmon@vger.kernel.org,
linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org
Subject: [PATCH v3 1/4] devres: Provide krealloc_array
Date: Mon, 20 Mar 2023 14:57:06 +0000 [thread overview]
Message-ID: <20230320145710.1120469-2-james.clark@arm.com> (raw)
In-Reply-To: <20230320145710.1120469-1-james.clark@arm.com>
There is no krealloc_array equivalent in devres. Users would have to
do their own multiplication overflow check so provide one.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: James Clark <james.clark@arm.com>
---
Documentation/driver-api/driver-model/devres.rst | 1 +
include/linux/device.h | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 4249eb4239e0..8be086b3f829 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -364,6 +364,7 @@ MEM
devm_kmalloc_array()
devm_kmemdup()
devm_krealloc()
+ devm_krealloc_array()
devm_kstrdup()
devm_kstrdup_const()
devm_kvasprintf()
diff --git a/include/linux/device.h b/include/linux/device.h
index 1508e637bb26..4dce92e99d08 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -223,6 +223,17 @@ static inline void *devm_kcalloc(struct device *dev,
{
return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
}
+static inline __realloc_size(3, 4) void * __must_check
+devm_krealloc_array(struct device *dev, void *p, size_t new_n, size_t new_size, gfp_t flags)
+{
+ size_t bytes;
+
+ if (unlikely(check_mul_overflow(new_n, new_size, &bytes)))
+ return NULL;
+
+ return devm_krealloc(dev, p, bytes, flags);
+}
+
void devm_kfree(struct device *dev, const void *p);
char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) __malloc;
const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp);
--
2.34.1
next prev parent reply other threads:[~2023-03-20 15:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 14:57 [PATCH v3 0/4] devres: Provide krealloc_array James Clark
2023-03-20 14:57 ` James Clark [this message]
2023-03-20 14:57 ` [PATCH v3 2/4] hwmon: pmbus: Use devm_krealloc_array James Clark
2023-03-20 14:57 ` [PATCH v3 3/4] iio: adc: " James Clark
2023-03-20 14:57 ` [PATCH v3 4/4] serial: qcom_geni: Comment use of devm_krealloc rather than devm_krealloc_array James Clark
2023-03-25 19:14 ` Jonathan Cameron
2023-04-25 12:51 ` [PATCH v3 0/4] devres: Provide krealloc_array James Clark
2023-04-25 13:00 ` Greg Kroah-Hartman
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