diff mbox series

[2/3] uprobes: simplify error handling for alloc_uprobe()

Message ID 20240710163111.GC13298@redhat.com (mailing list archive)
State Accepted
Commit 7c2bae2d9c27a89280b63ff3567d2dac2d89db28
Delegated to: Masami Hiramatsu
Headers show
Series uprobes: future cleanups for review | expand

Commit Message

Oleg Nesterov July 10, 2024, 4:31 p.m. UTC
From: Andrii Nakryiko <andrii@kernel.org>

Return -ENOMEM instead of NULL, which makes caller's error handling just
a touch simpler.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 kernel/events/uprobes.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Comments

Masami Hiramatsu (Google) July 11, 2024, 3:18 p.m. UTC | #1
On Wed, 10 Jul 2024 18:31:11 +0200
Oleg Nesterov <oleg@redhat.com> wrote:

> From: Andrii Nakryiko <andrii@kernel.org>
> 
> Return -ENOMEM instead of NULL, which makes caller's error handling just
> a touch simpler.
> 
> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
> Signed-off-by: Oleg Nesterov <oleg@redhat.com>

Looks good to me.

Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

> ---
>  kernel/events/uprobes.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index 4950decebe5c..e5b7c6239970 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -725,7 +725,7 @@ static struct uprobe *alloc_uprobe(struct inode *inode, loff_t offset,
>  
>  	uprobe = kzalloc(sizeof(struct uprobe), GFP_KERNEL);
>  	if (!uprobe)
> -		return NULL;
> +		return ERR_PTR(-ENOMEM);
>  
>  	uprobe->inode = inode;
>  	uprobe->offset = offset;
> @@ -1166,8 +1166,6 @@ int uprobe_register(struct inode *inode, loff_t offset, loff_t ref_ctr_offset,
>  
>   retry:
>  	uprobe = alloc_uprobe(inode, offset, ref_ctr_offset);
> -	if (!uprobe)
> -		return -ENOMEM;
>  	if (IS_ERR(uprobe))
>  		return PTR_ERR(uprobe);
>  
> -- 
> 2.25.1.362.g51ebf55
> 
>
diff mbox series

Patch

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 4950decebe5c..e5b7c6239970 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -725,7 +725,7 @@  static struct uprobe *alloc_uprobe(struct inode *inode, loff_t offset,
 
 	uprobe = kzalloc(sizeof(struct uprobe), GFP_KERNEL);
 	if (!uprobe)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	uprobe->inode = inode;
 	uprobe->offset = offset;
@@ -1166,8 +1166,6 @@  int uprobe_register(struct inode *inode, loff_t offset, loff_t ref_ctr_offset,
 
  retry:
 	uprobe = alloc_uprobe(inode, offset, ref_ctr_offset);
-	if (!uprobe)
-		return -ENOMEM;
 	if (IS_ERR(uprobe))
 		return PTR_ERR(uprobe);