Commit d388f06a authored by James Clark's avatar James Clark Committed by Greg Kroah-Hartman
Browse files

devres: Provide krealloc_array 



There is no krealloc_array equivalent in devres. Users would have to
do their own multiplication overflow check so provide one.

Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarJames Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20230509094942.396150-2-james.clark@arm.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7877cb91

Documentation/driver-api/driver-model/devres.rst

+1 −0
Original line number Diff line number Diff line
@@ -364,6 +364,7 @@ MEM 
  devm_kmalloc_array()

  devm_kmemdup()

  devm_krealloc()

  devm_krealloc_array()

  devm_kstrdup()

  devm_kstrdup_const()

  devm_kvasprintf()

include/linux/device.h

+11 −0
Original line number Diff line number Diff line
@@ -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);