Re: [PATCH v13 20/22] mm: zswap: Consistently use IS_ERR_OR_NULL() to check acomp_ctx resources.

[Yosry Ahmed <yosry.ahmed@linux.dev>]

On Tue, Nov 04, 2025 at 01:12:33AM -0800, Kanchana P Sridhar wrote:
> This patch uses IS_ERR_OR_NULL() in zswap_cpu_comp_prepare() to check
> for valid acomp/req, thereby making it consistent with
> acomp_ctx_dealloc().

Instead of "This patch..":

Use IS_ERR_OR_NULL() in zswap_cpu_comp_prepare() to check for valid
acomp/req, making it consistent with acomp_ctx_dealloc().

> 
> This is based on this earlier comment [1] from Yosry, when reviewing v8.

Drop this statement, it loses its meaning after the code is merged.

With those changes:
Acked-by: Yosry Ahmed <yosry.ahmed@linux.dev>

> 
> [1] https://patchwork.kernel.org/comment/26282128/
> 
> Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@intel.com>
> ---
>  mm/zswap.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/zswap.c b/mm/zswap.c
> index 87d50786f61f..cb384eb7c815 100644
> --- a/mm/zswap.c
> +++ b/mm/zswap.c
> @@ -780,7 +780,7 @@ static int zswap_cpu_comp_prepare(unsigned int cpu, struct hlist_node *node)
>  		return ret;
>  
>  	acomp_ctx->acomp = crypto_alloc_acomp_node(pool->tfm_name, 0, 0, cpu_to_node(cpu));
> -	if (IS_ERR(acomp_ctx->acomp)) {
> +	if (IS_ERR_OR_NULL(acomp_ctx->acomp)) {
>  		pr_err("could not alloc crypto acomp %s : %ld\n",
>  				pool->tfm_name, PTR_ERR(acomp_ctx->acomp));
>  		ret = PTR_ERR(acomp_ctx->acomp);
> @@ -789,7 +789,7 @@ static int zswap_cpu_comp_prepare(unsigned int cpu, struct hlist_node *node)
>  	acomp_ctx->is_sleepable = acomp_is_async(acomp_ctx->acomp);
>  
>  	acomp_ctx->req = acomp_request_alloc(acomp_ctx->acomp);
> -	if (!acomp_ctx->req) {
> +	if (IS_ERR_OR_NULL(acomp_ctx->req)) {
>  		pr_err("could not alloc crypto acomp_request %s\n",
>  		       pool->tfm_name);
>  		goto fail;
> -- 
> 2.27.0
>