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darray.c


products/sources/formale Sprachen/C/Linux/fs/bcachefs/darray.c

// SPDX-License-Identifier: GPL-2.0 #include #include #include #include "darray.h" int __bch2_darray_resize_noprof(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); /* * This is a workaround: kvmalloc() doesn't support > INT_MAX * allocations, but vmalloc() does. * The limit needs to be lifted from kvmalloc, and when it does * we'll go back to just using that. */ size_t bytes; if (unlikely(check_mul_overflow(new_size, element_size, &bytes))) return -ENOMEM; void *data = likely(bytes < INT_MAX) ? kvmalloc_noprof(bytes, gfp) : vmalloc_noprof(bytes); if (!data) return -ENOMEM; if (d->size) 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; }