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devres: Provide krealloc_array

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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>
Link: https://lore.kernel.org/r/20230509094942.396150-2-james.clark@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
James Clark 2023-05-09 10:49:38 +01:00 committed by Greg Kroah-Hartman
parent 7877cb91f1
commit d388f06ace
2 changed files with 12 additions and 0 deletions
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1
Documentation/driver-api/driver-model/devres.rst
View File

@ -364,6 +364,7 @@ MEM
devm_kmalloc_array()
devm_kmemdup()
devm_krealloc()
devm_krealloc_array()
devm_kstrdup()
devm_kstrdup_const()
devm_kvasprintf()

11
include/linux/device.h
View File

@ -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);