mm/damon/modules-common.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Common Primitives for DAMON Modules
   4  *
   5  * Author: SeongJae Park <sj@kernel.org>
   6  */
   7
   8 #include <linux/damon.h>
   9
  10 #include "modules-common.h"
  11
  12 /*
  13  * Allocate, set, and return a DAMON context for the physical address space.
  14  * @ctxp:       Pointer to save the point to the newly created context
  15  * @targetp:    Pointer to save the point to the newly created target
  16  */
  17 int damon_modules_new_paddr_ctx_target(struct damon_ctx **ctxp,
  18                 struct damon_target **targetp)
  19 {
  20         struct damon_ctx *ctx;
  21         struct damon_target *target;
  22
  23         ctx = damon_new_ctx();
  24         if (!ctx)
  25                 return -ENOMEM;
  26
  27         if (damon_select_ops(ctx, DAMON_OPS_PADDR)) {
  28                 damon_destroy_ctx(ctx);
  29                 return -EINVAL;
  30         }
  31
  32         target = damon_new_target();
  33         if (!target) {
  34                 damon_destroy_ctx(ctx);
  35                 return -ENOMEM;
  36         }
  37         damon_add_target(ctx, target);
  38
  39         *ctxp = ctx;
  40         *targetp = target;
  41         return 0;
  42 }