The attr->value_size is already assigned to smap->map.value_size
in bpf_map_init_from_attr(), there is no need to do it again in
stack_map_alloc()

Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
---
 kernel/bpf/stackmap.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c
index 34725bfa1e97..6131b4a19572 100644
--- a/kernel/bpf/stackmap.c
+++ b/kernel/bpf/stackmap.c
@@ -106,7 +106,6 @@ static struct bpf_map *stack_map_alloc(union bpf_attr *attr)
 		return ERR_PTR(-ENOMEM);
 
 	bpf_map_init_from_attr(&smap->map, attr);
-	smap->map.value_size = value_size;
 	smap->n_buckets = n_buckets;
 
 	err = get_callchain_buffers(sysctl_perf_event_max_stack);
-- 
2.35.0.rc2

On Wed, Mar 23, 2022 at 2:21 AM Yuntao Wang <ytcoode@gmail.com> wrote:
>
> The attr->value_size is already assigned to smap->map.value_size
> in bpf_map_init_from_attr(), there is no need to do it again in
> stack_map_alloc()
>
> Signed-off-by: Yuntao Wang <ytcoode@gmail.com>

LGTM.
Acked-by: Joanne Koong <joannelkoong@gmail.com>

> ---
>  kernel/bpf/stackmap.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c
> index 34725bfa1e97..6131b4a19572 100644
> --- a/kernel/bpf/stackmap.c
> +++ b/kernel/bpf/stackmap.c
> @@ -106,7 +106,6 @@ static struct bpf_map *stack_map_alloc(union bpf_attr *attr)
>                 return ERR_PTR(-ENOMEM);
>
>         bpf_map_init_from_attr(&smap->map, attr);
> -       smap->map.value_size = value_size;
>         smap->n_buckets = n_buckets;
>
>         err = get_callchain_buffers(sysctl_perf_event_max_stack);
> --
> 2.35.0.rc2
>

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@iogearbox.net>:

On Wed, 23 Mar 2022 15:36:26 +0800 you wrote:
> The attr->value_size is already assigned to smap->map.value_size
> in bpf_map_init_from_attr(), there is no need to do it again in
> stack_map_alloc()
> 
> Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
> ---
>  kernel/bpf/stackmap.c | 1 -
>  1 file changed, 1 deletion(-)

Here is the summary with links:
  - [bpf-next] bpf: Remove redundant assignment to smap->map.value_size
    https://git.kernel.org/bpf/bpf-next/c/8eb943fc5e5f

You are awesome, thank you!
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