Fixes tag confusion

Fixes tag confusion

[Nicholas Mc Guire]

Hi !

 Looking at some of the fixes tags in linux-stable e.g.

commit 27d231c0c63b -> :pnfs_alloc_ds_commits_list:fs/nfs/pnfs_nfs.c 
Fixes: a9901899b649

 inspecting the history of this function shows

linux-stable$ git log  -L:pnfs_alloc_ds_commits_list:fs/nfs/pnfs_nfs.c | grep "^commit "
commit 27d231c0c63bb619997a24bab85d54d90ca71110
commit a9901899b649dc80ef75c14d6d78059cae14def7
commit 0cb1f6df8a63b51f276f94d94957d7a7ca757667
commit f54bcf2ecee982da47c2baf8bd87fd9ad9984651

 or:

commit 9b8b17541f13
Fixes: e26733e0d0ec

 gives me:

linux-stable$ git log -L:calculate_high_delay:mm/memcontrol.c | grep "^commit "
commit 9b8b17541f13809d06f6f873325305ddbb760e3e
commit e26733e0d0ec6798eca93daa300bc3f43616127f
commit d397a45fc741c80c32a14e2de008441e9976f50c
commit 0e4b01df865935007bd712cbc8e7299005b28894
commit f7e1cb6ec51b041335b5ad4dd7aefb37a56d79a6
commit b23afb93d317c65cef553b804f08dec8a7a0f7e1
 
 the initial bug introducing commit and the fix commit are visible
 But then there are other cases like:

commit 26c5d78c976c which fixed up get_fs_type in fs/filesystems.c 
Fixes: 41124db869b7

commit 26c5d78c976c
<snip>
-               WARN_ONCE(!fs, "request_module fs-%.*s succeeded, but still no fs?\n", len, name);
+               if (!fs)
+                       pr_warn_once("request_module fs-%.*s succeeded, but still no fs?\n",
+                                    len, name);
<snip>
Fixes: 41124db869b7
<snip>
-       if (!fs && (request_module("fs-%.*s", len, name) == 0))
+       if (!fs && (request_module("fs-%.*s", len, name) == 0)) {
                fs = __get_fs_type(name, len);
+               WARN_ONCE(!fs, "request_module fs-%.*s succeeded, but still no fs?\n", len, name);
+       }
<snip>

 which seem to be correct - but git log does not display them ?

linux-stable$ git log -L:get_fs_type:fs/filesystems.c | grep "^commit "
commit d8e9650dff48055057253ca30933605bd7d0733b
commit 79c0b2df79eb56fc71e54c75cd7fb3acf84370f9
commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
 
 I see neither of the fix nor the fixed commit ? 
 This is on a Debian 10.3 with git version 2.20.1

 It does not seem to be a rename issue - so I'm a bit lost on this one
 Is this a wrong expectation on my side - or am I using git in some wrong way here ?

thx!
hofrat

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Re: Fixes tag confusion

[Valentin Vidić]

On Mon, Apr 13, 2020 at 07:15:17PM +0200, Nicholas Mc Guire wrote:
> linux-stable$ git log -L:get_fs_type:fs/filesystems.c | grep "^commit "
> commit d8e9650dff48055057253ca30933605bd7d0733b
> commit 79c0b2df79eb56fc71e54c75cd7fb3acf84370f9
> commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
>  
>  I see neither of the fix nor the fixed commit ? 
>  This is on a Debian 10.3 with git version 2.20.1
> 
>  It does not seem to be a rename issue - so I'm a bit lost on this one
>  Is this a wrong expectation on my side - or am I using git in some wrong way here ?

In this case it seems there is a function __get_fs_type earlier in the file
that gets matched instead:

  static struct file_system_type *__get_fs_type(const char *name, int len)
  {
  ...
  }

  struct file_system_type *get_fs_type(const char *name)
  {
  ...
  }

You can try for example:

$ git log -L ':[*]get_fs_type:fs/filesystems.c'  fs/filesystems.c | grep ^commit
$ git log -L ':[^_]get_fs_type:fs/filesystems.c' fs/filesystems.c | grep ^commit
$ git log -L ':\bget_fs_type:fs/filesystems.c'   fs/filesystems.c | grep ^commit
commit 26c5d78c976ca298e59a56f6101a97b618ba3539
commit 41124db869b7e00e12052555f8987867ac01d70c
commit 7f78e0351394052e1a6293e175825eb5c7869507
commit d8e9650dff48055057253ca30933605bd7d0733b
commit 79c0b2df79eb56fc71e54c75cd7fb3acf84370f9
commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

-- 
Valentin

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Re: Fixes tag confusion

[Nicholas Mc Guire]

On Mon, Apr 13, 2020 at 09:46:41PM +0200, Valentin Vidi?? wrote:
> On Mon, Apr 13, 2020 at 07:15:17PM +0200, Nicholas Mc Guire wrote:
> > linux-stable$ git log -L:get_fs_type:fs/filesystems.c | grep "^commit "
> > commit d8e9650dff48055057253ca30933605bd7d0733b
> > commit 79c0b2df79eb56fc71e54c75cd7fb3acf84370f9
> > commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
> >  
> >  I see neither of the fix nor the fixed commit ? 
> >  This is on a Debian 10.3 with git version 2.20.1
> > 
> >  It does not seem to be a rename issue - so I'm a bit lost on this one
> >  Is this a wrong expectation on my side - or am I using git in some wrong way here ?
> 
> In this case it seems there is a function __get_fs_type earlier in the file
> that gets matched instead:
> 
>   static struct file_system_type *__get_fs_type(const char *name, int len)
>   {
>   ...
>   }
> 
>   struct file_system_type *get_fs_type(const char *name)
>   {
>   ...
>   }
> 
> You can try for example:
> 
> $ git log -L ':[*]get_fs_type:fs/filesystems.c'  fs/filesystems.c | grep ^commit
> $ git log -L ':[^_]get_fs_type:fs/filesystems.c' fs/filesystems.c | grep ^commit
> $ git log -L ':\bget_fs_type:fs/filesystems.c'   fs/filesystems.c | grep ^commit
> commit 26c5d78c976ca298e59a56f6101a97b618ba3539
> commit 41124db869b7e00e12052555f8987867ac01d70c
> commit 7f78e0351394052e1a6293e175825eb5c7869507
> commit d8e9650dff48055057253ca30933605bd7d0733b
> commit 79c0b2df79eb56fc71e54c75cd7fb3acf84370f9
> commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
>
thanks - yes that does it for my case - I did not see
the function name as a regex - thanks for the clarification !

thx!
hofrat

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