xref: /OK3568_Linux_fs/kernel/lib/memregion.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /* identifiers for device / performance-differentiated memory regions */
3*4882a593Smuzhiyun #include <linux/idr.h>
4*4882a593Smuzhiyun #include <linux/types.h>
5*4882a593Smuzhiyun #include <linux/memregion.h>
6*4882a593Smuzhiyun 
7*4882a593Smuzhiyun static DEFINE_IDA(memregion_ids);
8*4882a593Smuzhiyun 
memregion_alloc(gfp_t gfp)9*4882a593Smuzhiyun int memregion_alloc(gfp_t gfp)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun 	return ida_alloc(&memregion_ids, gfp);
12*4882a593Smuzhiyun }
13*4882a593Smuzhiyun EXPORT_SYMBOL(memregion_alloc);
14*4882a593Smuzhiyun 
memregion_free(int id)15*4882a593Smuzhiyun void memregion_free(int id)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun 	ida_free(&memregion_ids, id);
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun EXPORT_SYMBOL(memregion_free);
20