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From:   Roman Gushchin <guro@fb.com>
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Subject: [PATCH bpf-next v2 15/35] bpf: eliminate rlimit-based memory accounting for cpumap maps
Date:   Mon, 27 Jul 2020 11:44:46 -0700
Message-ID: <20200727184506.2279656-16-guro@fb.com>
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Do not use rlimit-based memory accounting for cpumap maps.
It has been replaced with the memcg-based memory accounting.

Signed-off-by: Roman Gushchin <guro@fb.com>
---
 kernel/bpf/cpumap.c | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c
index 74ae9fcbe82e..50f3444a3301 100644
--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -86,8 +86,6 @@ static struct bpf_map *cpu_map_alloc(union bpf_attr *at=
tr)
 	u32 value_size =3D attr->value_size;
 	struct bpf_cpu_map *cmap;
 	int err =3D -ENOMEM;
-	u64 cost;
-	int ret;
=20
 	if (!bpf_capable())
 		return ERR_PTR(-EPERM);
@@ -111,26 +109,14 @@ static struct bpf_map *cpu_map_alloc(union bpf_attr=
 *attr)
 		goto free_cmap;
 	}
=20
-	/* make sure page count doesn't overflow */
-	cost =3D (u64) cmap->map.max_entries * sizeof(struct bpf_cpu_map_entry =
*);
-
-	/* Notice returns -EPERM on if map size is larger than memlock limit */
-	ret =3D bpf_map_charge_init(&cmap->map.memory, cost);
-	if (ret) {
-		err =3D ret;
-		goto free_cmap;
-	}
-
 	/* Alloc array for possible remote "destination" CPUs */
 	cmap->cpu_map =3D bpf_map_area_alloc(cmap->map.max_entries *
 					   sizeof(struct bpf_cpu_map_entry *),
 					   cmap->map.numa_node);
 	if (!cmap->cpu_map)
-		goto free_charge;
+		goto free_cmap;
=20
 	return &cmap->map;
-free_charge:
-	bpf_map_charge_finish(&cmap->map.memory);
 free_cmap:
 	kfree(cmap);
 	return ERR_PTR(err);
--=20
2.26.2