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bpf: Remove migrate_{disable|enable} in bpf_obj_free_fields()

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The callers of bpf_obj_free_fields() have already guaranteed that the
migration is disabled, therefore, there is no need to invoke
migrate_{disable,enable} pair in bpf_obj_free_fields()'s underly
implementation.

This patch removes unnecessary migrate_{disable|enable} pairs from
bpf_obj_free_fields() and its callees: bpf_list_head_free() and
bpf_rb_root_free().

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20250108010728.207536-12-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Hou Tao
2025-01-08 09:07:23 +08:00
committed by Alexei Starovoitov
parent 4b7e7cd1c1
commit 1d2dbe7120
2 changed files with 0 additions and 6 deletions
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4
kernel/bpf/helpers.c
View File

@@ -2066,9 +2066,7 @@ unlock:
/* The contained type can also have resources, including a
* bpf_list_head which needs to be freed.
*/
migrate_disable();
__bpf_obj_drop_impl(obj, field->graph_root.value_rec, false);
migrate_enable();
}
}
@@ -2105,9 +2103,7 @@ void bpf_rb_root_free(const struct btf_field *field, void *rb_root,
obj -= field->graph_root.node_offset;
migrate_disable();
__bpf_obj_drop_impl(obj, field->graph_root.value_rec, false);
migrate_enable();
}
}

2
kernel/bpf/syscall.c
View File

@@ -796,11 +796,9 @@ void bpf_obj_free_fields(const struct btf_record *rec, void *obj)
if (!btf_is_kernel(field->kptr.btf)) {
pointee_struct_meta = btf_find_struct_meta(field->kptr.btf,
field->kptr.btf_id);
migrate_disable();
__bpf_obj_drop_impl(xchgd_field, pointee_struct_meta ?
pointee_struct_meta->record : NULL,
fields[i].type == BPF_KPTR_PERCPU);
migrate_enable();
} else {
field->kptr.dtor(xchgd_field);
}