linux/fs/bcachefs/darray.c
Kent Overstreet 099dc5c29d bcachefs: DARRAY_PREALLOCATED()
Add support to darray for preallocating some number of elements.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-01-01 11:46:52 -05:00

25 lines
522 B
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/log2.h>
#include <linux/slab.h>
#include "darray.h"
int __bch2_darray_resize(darray_char *d, size_t element_size, size_t new_size, gfp_t gfp)
{
if (new_size > d->size) {
new_size = roundup_pow_of_two(new_size);
void *data = kvmalloc_array(new_size, element_size, gfp);
if (!data)
return -ENOMEM;
memcpy(data, d->data, d->size * element_size);
if (d->data != d->preallocated)
kvfree(d->data);
d->data = data;
d->size = new_size;
}
return 0;
}