Commit ec9cc18fc2e6 ("bcachefs: Add checks for invalid snapshot IDs")
intends to check the sanity of a snapshot and panic when
BCACHEFS_DEBUG is set, but that conditional has a typo.

Fix the typo to refer to the actual existing Kconfig symbol.

This was found with ./scripts/checkkconfigsymbols.py.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
---
 fs/bcachefs/snapshot.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/bcachefs/snapshot.h b/fs/bcachefs/snapshot.h
index b7d2fed37c4f..3fdb41b33d2d 100644
--- a/fs/bcachefs/snapshot.h
+++ b/fs/bcachefs/snapshot.h
@@ -77,7 +77,7 @@ static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
 		return 0;
 
 	u32 parent = s->parent;
-	if (IS_ENABLED(CONFIG_BCACHEFS_DEBU) &&
+	if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
 	    parent &&
 	    s->depth != snapshot_t(c, parent)->depth + 1)
 		panic("id %u depth=%u parent %u depth=%u\n",
-- 
2.44.0

Also, I am curious why such spelling errors cannot be detected at the 
compilation stage.

On 2024/4/11 16:29, Lukas Bulwahn wrote:
> Commit ec9cc18fc2e6 ("bcachefs: Add checks for invalid snapshot IDs")
> intends to check the sanity of a snapshot and panic when
> BCACHEFS_DEBUG is set, but that conditional has a typo.
> 
> Fix the typo to refer to the actual existing Kconfig symbol.
> 
> This was found with ./scripts/checkkconfigsymbols.py.
> 
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
> ---
>   fs/bcachefs/snapshot.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/bcachefs/snapshot.h b/fs/bcachefs/snapshot.h
> index b7d2fed37c4f..3fdb41b33d2d 100644
> --- a/fs/bcachefs/snapshot.h
> +++ b/fs/bcachefs/snapshot.h
> @@ -77,7 +77,7 @@ static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
>   		return 0;
>   
>   	u32 parent = s->parent;
> -	if (IS_ENABLED(CONFIG_BCACHEFS_DEBU) &&
> +	if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
>   	    parent &&
>   	    s->depth != snapshot_t(c, parent)->depth + 1)
>   		panic("id %u depth=%u parent %u depth=%u\n",

On Thu, Apr 11, 2024 at 05:21:05PM +0800, Hongbo Li wrote:
> Also, I am curious why such spelling errors cannot be detected at the
> compilation stage.

code coverage analysis would catch this. I'm one patch away from fully
automated code coverage.

Thanks, got it. And I found many similar cases in other kernel modules. 
Also, the janitors project seems quite interesting.

On 2024/4/12 1:31, Kent Overstreet wrote:
> On Thu, Apr 11, 2024 at 05:21:05PM +0800, Hongbo Li wrote:
>> Also, I am curious why such spelling errors cannot be detected at the
>> compilation stage.
> 
> code coverage analysis would catch this. I'm one patch away from fully
> automated code coverage.

On Thu, Apr 11, 2024 at 05:21:05PM +0800, Hongbo Li wrote:
> Also, I am curious why such spelling errors cannot be detected at the
> compilation stage.
> 

The IS_ENABLED() macro is testing whether the define exists or not.
In this case both "CONFIG_BCACHEFS_DEBUG" and "CONFIG_BCACHEFS_DEBU" do
not exist for this config.

Lukas's scripts make a list of macros we expect to exist and then checks
against the list.

regards,
dan carpenter

Thanks, I got it!

On 2024/4/11 18:21, Dan Carpenter wrote:
> On Thu, Apr 11, 2024 at 05:21:05PM +0800, Hongbo Li wrote:
>> Also, I am curious why such spelling errors cannot be detected at the
>> compilation stage.
>>
> 
> The IS_ENABLED() macro is testing whether the define exists or not.
> In this case both "CONFIG_BCACHEFS_DEBUG" and "CONFIG_BCACHEFS_DEBU" do
> not exist for this config.
> 
> Lukas's scripts make a list of macros we expect to exist and then checks
> against the list.
> 
> regards,
> dan carpenter
>

On 2024/4/11 16:29, Lukas Bulwahn wrote:
> Commit ec9cc18fc2e6 ("bcachefs: Add checks for invalid snapshot IDs")
> intends to check the sanity of a snapshot and panic when
> BCACHEFS_DEBUG is set, but that conditional has a typo.
> 
> Fix the typo to refer to the actual existing Kconfig symbol.
> 
> This was found with ./scripts/checkkconfigsymbols.py.
> 
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
> ---
>   fs/bcachefs/snapshot.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/bcachefs/snapshot.h b/fs/bcachefs/snapshot.h
> index b7d2fed37c4f..3fdb41b33d2d 100644
> --- a/fs/bcachefs/snapshot.h
> +++ b/fs/bcachefs/snapshot.h
> @@ -77,7 +77,7 @@ static inline u32 __bch2_snapshot_parent(struct bch_fs *c, u32 id)
>   		return 0;
>   
>   	u32 parent = s->parent;
> -	if (IS_ENABLED(CONFIG_BCACHEFS_DEBU) &&
> +	if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
>   	    parent &&
>   	    s->depth != snapshot_t(c, parent)->depth + 1)
>   		panic("id %u depth=%u parent %u depth=%u\n",

Reviewed-by: Hongbo Li <lihongbo22@huawei.com>