Re: [ros-dev] [ros-diffs] [fireball] 53596: [NTOS/CONFIG] - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This may change the behaviour of that codepath, so test results are going to be observed.

[Alex Ionescu]

Uhhhh...

Am I really the *only* one who sees a problem here?

ChildList = &Kcb->ValueCache;
-    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

Best regards,
Alex Ionescu


On Mon, Sep 5, 2011 at 10:54 AM, <fireball(a)svn.reactos.org> wrote:

>   Author: fireball
>  Date: Mon Sep  5 09:54:20 2011
>  New Revision: 53596
>
>  URL: http://svn.reactos.org/svn/reactos?rev=53596&view=rev
>  Log:
>  [NTOS/CONFIG]
>  - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This
>  may change the behaviour of that codepath, so test results are going to be
>  observed.
>
>  Modified:
>     trunk/reactos/ntoskrnl/config/cmvalche.c
>
>  Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
>  URL:
>
> http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
>
>  ==============================================================================
>  --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
>  +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5
>  09:54:20 2011
>  @@ -49,7 +49,6 @@
>      PHHIVE Hive;
>      PCACHED_CHILD_LIST ChildList;
>      HCELL_INDEX CellToRelease;
>  -    PCM_KEY_NODE KeyNode;
>
>      /* Set defaults */
>      *ValueListToRelease = HCELL_NIL;
>  @@ -58,8 +57,6 @@
>      /* Get the hive and value cache */
>      Hive = Kcb->KeyHive;
>      ChildList = &Kcb->ValueCache;
>  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>
>      /* Check if the value is cached */
>      if (CmpIsValueCached(ChildList->ValueList))
>  @@ -212,7 +209,6 @@
>      BOOLEAN IndexIsCached;
>      ULONG i = 0;
>      HCELL_INDEX Cell = HCELL_NIL;
>  -    PCM_KEY_NODE KeyNode;
>
>      /* Set defaults */
>      *CellToRelease = HCELL_NIL;
>  @@ -221,8 +217,6 @@
>      /* Get the hive and child list */
>      Hive = Kcb->KeyHive;
>      ChildList = &Kcb->ValueCache;
>  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>
>      /* Check if the child list has any entries */
>      if (ChildList->Count != 0)
>
>
>

[Aleksey Bragin]

Let me guess, do you want it to be
ChildList = &(Kcb->ValueCache);

?

WBR,
Aleksey.

From: Alex Ionescu 
Sent: Monday, September 05, 2011 3:46 PM
To: ros-dev(a)reactos.org 
Cc: ros-diffs(a)reactos.org 
Subject: Re: [ros-dev] [ros-diffs] [fireball] 53596: [NTOS/CONFIG] - Remove unnecessary
assignments. Spotted by PVS and Dmitry Chapyshev. This may change the behaviour of that
codepath, so test results are going to be observed.

Uhhhh... 

Am I really the *only* one who sees a problem here?

ChildList = &Kcb->ValueCache;
-    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

Best regards,
Alex Ionescu



On Mon, Sep 5, 2011 at 10:54 AM, <fireball(a)svn.reactos.org> wrote:

  Author: fireball
  Date: Mon Sep  5 09:54:20 2011
  New Revision: 53596

  URL: http://svn.reactos.org/svn/reactos?rev=53596&view=rev
  Log:
  [NTOS/CONFIG]
  - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This may change
the behaviour of that codepath, so test results are going to be observed.

  Modified:
     trunk/reactos/ntoskrnl/config/cmvalche.c

  Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
  URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
  ==============================================================================
  --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
  +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5 09:54:20 2011
  @@ -49,7 +49,6 @@
      PHHIVE Hive;
      PCACHED_CHILD_LIST ChildList;
      HCELL_INDEX CellToRelease;
  -    PCM_KEY_NODE KeyNode;

      /* Set defaults */
      *ValueListToRelease = HCELL_NIL;
  @@ -58,8 +57,6 @@
      /* Get the hive and value cache */
      Hive = Kcb->KeyHive;
      ChildList = &Kcb->ValueCache;
  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

      /* Check if the value is cached */
      if (CmpIsValueCached(ChildList->ValueList))
  @@ -212,7 +209,6 @@
      BOOLEAN IndexIsCached;
      ULONG i = 0;
      HCELL_INDEX Cell = HCELL_NIL;
  -    PCM_KEY_NODE KeyNode;

      /* Set defaults */
      *CellToRelease = HCELL_NIL;
  @@ -221,8 +217,6 @@
      /* Get the hive and child list */
      Hive = Kcb->KeyHive;
      ChildList = &Kcb->ValueCache;
  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

      /* Check if the child list has any entries */
      if (ChildList->Count != 0)






--------------------------------------------------------------------------------
_______________________________________________
Ros-dev mailing list
Ros-dev(a)reactos.org
http://www.reactos.org/mailman/listinfo/ros-dev

[Alex Ionescu]

Is this a joke?

Best regards,
Alex Ionescu


On Mon, Sep 5, 2011 at 12:55 PM, Aleksey Bragin <aleksey(a)reactos.org> wrote:

>     Let me guess, do you want it to be
>  ChildList = &(Kcb->ValueCache);
>
>  ?
>
>  WBR,
>  Aleksey.
>
>   *From:* Alex Ionescu <ionucu(a)videotron.ca>
>  *Sent:* Monday, September 05, 2011 3:46 PM
>  *To:* ros-dev(a)reactos.org
>  *Cc:* ros-diffs(a)reactos.org
>  *Subject:* Re: [ros-dev] [ros-diffs] [fireball] 53596: [NTOS/CONFIG] -
>  Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This
>  may change the behaviour of that codepath, so test results are going to be
>  observed.
>
>  Uhhhh...
>
>  Am I really the *only* one who sees a problem here?
>
>  ChildList = &Kcb->ValueCache;
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>
>  Best regards,
>  Alex Ionescu
>
>
>  On Mon, Sep 5, 2011 at 10:54 AM, <fireball(a)svn.reactos.org> wrote:
>
> >   Author: fireball
> >  Date: Mon Sep  5 09:54:20 2011
> >  New Revision: 53596
> >
> >  URL: http://svn.reactos.org/svn/reactos?rev=53596&view=rev
> >  Log:
> >  [NTOS/CONFIG]
> >  - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev.
> >  This may change the behaviour of that codepath, so test results are going to
> >  be observed.
> >
> >  Modified:
> >     trunk/reactos/ntoskrnl/config/cmvalche.c
> >
> >  Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
> >  URL:
> >
> > http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
> >
> >  ==============================================================================
> >  --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
> >  +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5
> >  09:54:20 2011
> >  @@ -49,7 +49,6 @@
> >      PHHIVE Hive;
> >      PCACHED_CHILD_LIST ChildList;
> >      HCELL_INDEX CellToRelease;
> >  -    PCM_KEY_NODE KeyNode;
> >
> >      /* Set defaults */
> >      *ValueListToRelease = HCELL_NIL;
> >  @@ -58,8 +57,6 @@
> >      /* Get the hive and value cache */
> >      Hive = Kcb->KeyHive;
> >      ChildList = &Kcb->ValueCache;
> >  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
> >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> >
> >      /* Check if the value is cached */
> >      if (CmpIsValueCached(ChildList->ValueList))
> >  @@ -212,7 +209,6 @@
> >      BOOLEAN IndexIsCached;
> >      ULONG i = 0;
> >      HCELL_INDEX Cell = HCELL_NIL;
> >  -    PCM_KEY_NODE KeyNode;
> >
> >      /* Set defaults */
> >      *CellToRelease = HCELL_NIL;
> >  @@ -221,8 +217,6 @@
> >      /* Get the hive and child list */
> >      Hive = Kcb->KeyHive;
> >      ChildList = &Kcb->ValueCache;
> >  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
> >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> >
> >      /* Check if the child list has any entries */
> >      if (ChildList->Count != 0)
> >
> >
> >  
>  ------------------------------
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>

[Vicmarcal]

Nope,I have asked in #reactos-dev too about that removal just after the commiting was
done.
To begin I dont understand the logic in the original code about reassigning the value to
the ChildList two lines later(unless the first assignation is not needed at all)
And after the commit I dont understand   the commit message "unnecesary
assignments".Now,after removing the second assignment,the behavior should be totally
different(unless &Kcb->ValueCache; is == &KeyNode->ValueList; , which I
doubt). So if the removal is correct,then it wasnt an "unnecesary change" but a
"fixing a bug".
Anyway I am not a dev, so I express my doubts here too if anyone can light me a little :)

Enviado desde mi iPhone

El 05/09/2011, a las 13:48, "Alex Ionescu" <ionucu(a)videotron.ca>
escribió:

>   Uhhhh...
>  
>  Am I really the *only* one who sees a problem here?
>  
>  ChildList = &Kcb->ValueCache;
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>  
>  Best regards,
>  Alex Ionescu
>  
>  
>  On Mon, Sep 5, 2011 at 10:54 AM, <fireball(a)svn.reactos.org> wrote:
>  Author: fireball
>  Date: Mon Sep  5 09:54:20 2011
>  New Revision: 53596
>  
>  URL: http://svn.reactos.org/svn/reactos?rev=53596&view=rev
>  Log:
>  [NTOS/CONFIG]
>  - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This may change
> the behaviour of that codepath, so test results are going to be observed.
>  
>  Modified:
>     trunk/reactos/ntoskrnl/config/cmvalche.c
>  
>  Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
>  URL:
> http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
>  ==============================================================================
>  --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
>  +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5 09:54:20 2011
>  @@ -49,7 +49,6 @@
>      PHHIVE Hive;
>      PCACHED_CHILD_LIST ChildList;
>      HCELL_INDEX CellToRelease;
>  -    PCM_KEY_NODE KeyNode;
>  
>      /* Set defaults */
>      *ValueListToRelease = HCELL_NIL;
>  @@ -58,8 +57,6 @@
>      /* Get the hive and value cache */
>      Hive = Kcb->KeyHive;
>      ChildList = &Kcb->ValueCache;
>  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>  
>      /* Check if the value is cached */
>      if (CmpIsValueCached(ChildList->ValueList))
>  @@ -212,7 +209,6 @@
>      BOOLEAN IndexIsCached;
>      ULONG i = 0;
>      HCELL_INDEX Cell = HCELL_NIL;
>  -    PCM_KEY_NODE KeyNode;
>  
>      /* Set defaults */
>      *CellToRelease = HCELL_NIL;
>  @@ -221,8 +217,6 @@
>      /* Get the hive and child list */
>      Hive = Kcb->KeyHive;
>      ChildList = &Kcb->ValueCache;
>  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>  
>      /* Check if the child list has any entries */
>      if (ChildList->Count != 0)
>  
>  
>  
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev

[Alex Ionescu]

As a "non-dev" you seem to have understood the issue more than the project
developer leader! Good job.

Indeed, the original code lacks a comment stating that the first assignment
is how it's "supposed" to be done, but that the second assignment is
currently a hack to make ReactOS work (in the original commit I made, the
first line was commented out -- but a comment never added as to why). So
that's my fault.

You're also right that this "unneccessary assignment" is actually quite
necessary, and that by removing the SECOND ChildList assignment, instead of
the first, the entire functionality of the function is modified -- if
anything, the first assignment should've been removed (since no comment was
there explaining why it was needed).

So yes, good job on understanding both these issues, and for none of the
devs seemingly able to see your correct logic...

Best regards,
Alex Ionescu


On Mon, Sep 5, 2011 at 1:03 PM, Vicmarcal <vicmarcal(a)hotmail.com> wrote:

>   Nope,I have asked in #reactos-dev too about that
> removal just after the
>  commiting was done.
>  To begin I dont understand the logic in the original code about reassigning
>  the value to the ChildList two lines later(unless the first assignation is
>  not needed at all)
>  And after the commit I dont understand   the commit message "unnecesary
>  assignments".Now,after removing the second assignment,the behavior should be
>  totally different(unless &Kcb->ValueCache; is == &KeyNode->ValueList; ,
>  which I doubt). So if the removal is correct,then it wasnt an "unnecesary
>  change" but a "fixing a bug".
>  Anyway I am not a dev, so I express my doubts here too if anyone can light
>  me a little :)
>
>  Enviado desde mi iPhone
>
>  El 05/09/2011, a las 13:48, "Alex Ionescu" <ionucu(a)videotron.ca>
> escribió:
>
>  Uhhhh...
>
>  Am I really the *only* one who sees a problem here?
>
>  ChildList = &Kcb->ValueCache;
>  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
>
>  Best regards,
>  Alex Ionescu
>
>
>  On Mon, Sep 5, 2011 at 10:54 AM, < &lt;fireball(a)svn.reactos.org&gt;
>  fireball(a)svn.reactos.org&gt; wrote:
>
> >   Author: fireball
> >  Date: Mon Sep  5 09:54:20 2011
> >  New Revision: 53596
> >
> >  URL: <http://svn.reactos.org/svn/reactos?rev=53596&view=rev>
> >  http://svn.reactos.org/svn/reactos?rev=53596&view=rev
> >  Log:
> >  [NTOS/CONFIG]
> >  - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev.
> >  This may change the behaviour of that codepath, so test results are going to
> >  be observed.
> >
> >  Modified:
> >     trunk/reactos/ntoskrnl/config/cmvalche.c
> >
> >  Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
> >  URL:
> >
> > <http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c?rev=53596&r1=53595&r2=53596&view=diff>
> >
> > http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
> >
> >  ==============================================================================
> >  --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
> >  +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5
> >  09:54:20 2011
> >  @@ -49,7 +49,6 @@
> >      PHHIVE Hive;
> >      PCACHED_CHILD_LIST ChildList;
> >      HCELL_INDEX CellToRelease;
> >  -    PCM_KEY_NODE KeyNode;
> >
> >      /* Set defaults */
> >      *ValueListToRelease = HCELL_NIL;
> >  @@ -58,8 +57,6 @@
> >      /* Get the hive and value cache */
> >      Hive = Kcb->KeyHive;
> >      ChildList = &Kcb->ValueCache;
> >  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
> >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> >
> >      /* Check if the value is cached */
> >      if (CmpIsValueCached(ChildList->ValueList))
> >  @@ -212,7 +209,6 @@
> >      BOOLEAN IndexIsCached;
> >      ULONG i = 0;
> >      HCELL_INDEX Cell = HCELL_NIL;
> >  -    PCM_KEY_NODE KeyNode;
> >
> >      /* Set defaults */
> >      *CellToRelease = HCELL_NIL;
> >  @@ -221,8 +217,6 @@
> >      /* Get the hive and child list */
> >      Hive = Kcb->KeyHive;
> >      ChildList = &Kcb->ValueCache;
> >  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
> >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> >
> >      /* Check if the child list has any entries */
> >      if (ChildList->Count != 0)
> >
> >
> >  
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>

[Aleksey Bragin]

Perfect, I have a straight answer from you right away, so my trick worked.

Now, seriously, is that hack still needed? I understand it was needed during early time
when you developed this branch, but what about now? With all the changes it had over time
when you last worked on it?

From: Alex Ionescu 
Sent: Monday, September 05, 2011 8:25 PM
To: ReactOS Development List 
Subject: Re: [ros-dev] [ros-diffs] [fireball] 53596: [NTOS/CONFIG] - Remove unnecessary
assignments. Spotted by PVS and Dmitry Chapyshev. This may change the behaviour of that
codepath, so test results are going to be observed.

As a "non-dev" you seem to have understood the issue more than the project
developer leader! Good job. 

Indeed, the original code lacks a comment stating that the first assignment is how
it's "supposed" to be done, but that the second assignment is currently a
hack to make ReactOS work (in the original commit I made, the first line was commented out
-- but a comment never added as to why). So that's my fault.

You're also right that this "unneccessary assignment" is actually quite
necessary, and that by removing the SECOND ChildList assignment, instead of the first, the
entire functionality of the function is modified -- if anything, the first assignment
should've been removed (since no comment was there explaining why it was needed).

So yes, good job on understanding both these issues, and for none of the devs seemingly
able to see your correct logic...

Best regards,
Alex Ionescu



On Mon, Sep 5, 2011 at 1:03 PM, Vicmarcal <vicmarcal(a)hotmail.com> wrote:

  Nope,I have asked in #reactos-dev too about that removal just after the commiting was
done.
  To begin I dont understand the logic in the original code about reassigning the value to
the ChildList two lines later(unless the first assignation is not needed at all)
  And after the commit I dont understand   the commit message "unnecesary
assignments".Now,after removing the second assignment,the behavior should be totally
different(unless &Kcb->ValueCache; is == &KeyNode->ValueList; , which I
doubt). So if the removal is correct,then it wasnt an "unnecesary change" but a
"fixing a bug".
  Anyway I am not a dev, so I express my doubts here too if anyone can light me a little
:)

  Enviado desde mi iPhone

  El 05/09/2011, a las 13:48, "Alex Ionescu" <ionucu(a)videotron.ca>
escribió:


    Uhhhh... 

    Am I really the *only* one who sees a problem here?

    ChildList = &Kcb->ValueCache;
    -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

    Best regards,
    Alex Ionescu



    On Mon, Sep 5, 2011 at 10:54 AM, <fireball(a)svn.reactos.org> wrote:

      Author: fireball
      Date: Mon Sep  5 09:54:20 2011
      New Revision: 53596

      URL: http://svn.reactos.org/svn/reactos?rev=53596&view=rev
      Log:
      [NTOS/CONFIG]
      - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This may
change the behaviour of that codepath, so test results are going to be observed.

      Modified:
         trunk/reactos/ntoskrnl/config/cmvalche.c

      Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
      URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
      ==============================================================================
      --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
      +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5 09:54:20 2011
      @@ -49,7 +49,6 @@
          PHHIVE Hive;
          PCACHED_CHILD_LIST ChildList;
          HCELL_INDEX CellToRelease;
      -    PCM_KEY_NODE KeyNode;

          /* Set defaults */
          *ValueListToRelease = HCELL_NIL;
      @@ -58,8 +57,6 @@
          /* Get the hive and value cache */
          Hive = Kcb->KeyHive;
          ChildList = &Kcb->ValueCache;
      -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
      -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

          /* Check if the value is cached */
          if (CmpIsValueCached(ChildList->ValueList))
      @@ -212,7 +209,6 @@
          BOOLEAN IndexIsCached;
          ULONG i = 0;
          HCELL_INDEX Cell = HCELL_NIL;
      -    PCM_KEY_NODE KeyNode;

          /* Set defaults */
          *CellToRelease = HCELL_NIL;
      @@ -221,8 +217,6 @@
          /* Get the hive and child list */
          Hive = Kcb->KeyHive;
          ChildList = &Kcb->ValueCache;
      -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
      -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;

          /* Check if the child list has any entries */
          if (ChildList->Count != 0)




    _______________________________________________
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    Ros-dev(a)reactos.org
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  _______________________________________________
  Ros-dev mailing list
  Ros-dev(a)reactos.org
  http://www.reactos.org/mailman/listinfo/ros-dev





--------------------------------------------------------------------------------
_______________________________________________
Ros-dev mailing list
Ros-dev(a)reactos.org
http://www.reactos.org/mailman/listinfo/ros-dev

[Alex Ionescu]

Unless you are vicmarcal, my e-mail was not for you.

Best regards,
Alex Ionescu


On Mon, Sep 5, 2011 at 5:50 PM, Aleksey Bragin <aleksey(a)reactos.org> wrote:

>     Perfect, I have a straight answer from you right
> away, so my trick
>  worked.
>
>  Now, seriously, is that hack still needed? I understand it was needed
>  during early time when you developed this branch, but what about now? With
>  all the changes it had over time when you last worked on it?
>
>   *From:* Alex Ionescu <ionucu(a)videotron.ca>
>  *Sent:* Monday, September 05, 2011 8:25 PM
>  *To:* ReactOS Development List <ros-dev(a)reactos.org>
>  *Subject:* Re: [ros-dev] [ros-diffs] [fireball] 53596: [NTOS/CONFIG] -
>  Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev. This
>  may change the behaviour of that codepath, so test results are going to be
>  observed.
>
>  As a "non-dev" you seem to have understood the issue more than the project
>  developer leader! Good job.
>
>  Indeed, the original code lacks a comment stating that the first assignment
>  is how it's "supposed" to be done, but that the second assignment is
>  currently a hack to make ReactOS work (in the original commit I made, the
>  first line was commented out -- but a comment never added as to why). So
>  that's my fault.
>
>  You're also right that this "unneccessary assignment" is actually quite
>  necessary, and that by removing the SECOND ChildList assignment, instead of
>  the first, the entire functionality of the function is modified -- if
>  anything, the first assignment should've been removed (since no comment was
>  there explaining why it was needed).
>
>  So yes, good job on understanding both these issues, and for none of the
>  devs seemingly able to see your correct logic...
>
>  Best regards,
>  Alex Ionescu
>
>
>  On Mon, Sep 5, 2011 at 1:03 PM, Vicmarcal <vicmarcal(a)hotmail.com> wrote:
>
> >    Nope,I have asked in #reactos-dev too about that
> > removal just after the
> >  commiting was done.
> >  To begin I dont understand the logic in the original code about
> >  reassigning the value to the ChildList two lines later(unless the first
> >  assignation is not needed at all)
> >  And after the commit I dont understand   the commit message "unnecesary
> >  assignments".Now,after removing the second assignment,the behavior should be
> >  totally different(unless &Kcb->ValueCache; is == &KeyNode->ValueList; ,
> >  which I doubt). So if the removal is correct,then it wasnt an "unnecesary
> >  change" but a "fixing a bug".
> >  Anyway I am not a dev, so I express my doubts here too if anyone can light
> >  me a little :)
> >
> >  Enviado desde mi iPhone
> >
> >  El 05/09/2011, a las 13:48, "Alex Ionescu" <ionucu(a)videotron.ca>
> >  escribió:
> >
> >     Uhhhh...
> >
> >  Am I really the *only* one who sees a problem here?
> >
> >  ChildList = &Kcb->ValueCache;
> >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> >
> >  Best regards,
> >  Alex Ionescu
> >
> >
> >  On Mon, Sep 5, 2011 at 10:54 AM, <fireball(a)svn.reactos.org> wrote:
> >
> > >   Author: fireball
> > >  Date: Mon Sep  5 09:54:20 2011
> > >  New Revision: 53596
> > >
> > >  URL: http://svn.reactos.org/svn/reactos?rev=53596&view=rev
> > >  Log:
> > >  [NTOS/CONFIG]
> > >  - Remove unnecessary assignments. Spotted by PVS and Dmitry Chapyshev.
> > >  This may change the behaviour of that codepath, so test results are going to
> > >  be observed.
> > >
> > >  Modified:
> > >     trunk/reactos/ntoskrnl/config/cmvalche.c
> > >
> > >  Modified: trunk/reactos/ntoskrnl/config/cmvalche.c
> > >  URL:
> > >
> > > http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmvalche.c…
> > >
> > >  ==============================================================================
> > >  --- trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] (original)
> > >  +++ trunk/reactos/ntoskrnl/config/cmvalche.c [iso-8859-1] Mon Sep  5
> > >  09:54:20 2011
> > >  @@ -49,7 +49,6 @@
> > >      PHHIVE Hive;
> > >      PCACHED_CHILD_LIST ChildList;
> > >      HCELL_INDEX CellToRelease;
> > >  -    PCM_KEY_NODE KeyNode;
> > >
> > >      /* Set defaults */
> > >      *ValueListToRelease = HCELL_NIL;
> > >  @@ -58,8 +57,6 @@
> > >      /* Get the hive and value cache */
> > >      Hive = Kcb->KeyHive;
> > >      ChildList = &Kcb->ValueCache;
> > >  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
> > >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> > >
> > >      /* Check if the value is cached */
> > >      if (CmpIsValueCached(ChildList->ValueList))
> > >  @@ -212,7 +209,6 @@
> > >      BOOLEAN IndexIsCached;
> > >      ULONG i = 0;
> > >      HCELL_INDEX Cell = HCELL_NIL;
> > >  -    PCM_KEY_NODE KeyNode;
> > >
> > >      /* Set defaults */
> > >      *CellToRelease = HCELL_NIL;
> > >  @@ -221,8 +217,6 @@
> > >      /* Get the hive and child list */
> > >      Hive = Kcb->KeyHive;
> > >      ChildList = &Kcb->ValueCache;
> > >  -    KeyNode = (PCM_KEY_NODE)HvGetCell(Hive, Kcb->KeyCell);
> > >  -    ChildList = (PCACHED_CHILD_LIST)&KeyNode->ValueList;
> > >
> > >      /* Check if the child list has any entries */
> > >      if (ChildList->Count != 0)
> > >
> > >
> > >  
> >   _______________________________________________
> >  Ros-dev mailing list
> >  Ros-dev(a)reactos.org
> >  http://www.reactos.org/mailman/listinfo/ros-dev
> >
> >
> >  _______________________________________________
> >  Ros-dev mailing list
> >  Ros-dev(a)reactos.org
> >  http://www.reactos.org/mailman/listinfo/ros-dev
> >
> >  
>  ------------------------------
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>
>  _______________________________________________
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>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>

[Aleksey Bragin]

Yeah, but my e-mail was for you. If the hack is still needed, I better hurry up and revert
my changes.
From: Alex Ionescu 
Sent: Monday, September 05, 2011 9:25 PM

Unless you are vicmarcal, my e-mail was not for you. 

Best regards,
Alex Ionescu



On Mon, Sep 5, 2011 at 5:50 PM, Aleksey Bragin <aleksey(a)reactos.org> wrote:


  Now, seriously, is that hack still needed? I understand it was needed during early time
when you developed this branch, but what about now? With all the changes it had over time
when you last worked on it?

[Alex Ionescu]

Well I guess winetests will tell?

Best regards,
Alex Ionescu


On Mon, Sep 5, 2011 at 7:27 PM, Aleksey Bragin <aleksey(a)reactos.org> wrote:

>     Yeah, but my e-mail was for you. If the hack is
> still needed, I better
>  hurry up and revert my changes.
>    *From:* Alex Ionescu <ionucu(a)videotron.ca>
>  *Sent:* Monday, September 05, 2011 9:25 PM
>
>  Unless you are vicmarcal, my e-mail was not for you.
>
>  Best regards,
>  Alex Ionescu
>
>
>  On Mon, Sep 5, 2011 at 5:50 PM, Aleksey Bragin <aleksey(a)reactos.org>wrote;wrote:
>
> >  
> >  Now, seriously, is that hack still needed? I understand it was needed
> >  during early time when you developed this branch, but what about now? With
> >  all the changes it had over time when you last worked on it?
> >
> >  
>  _______________________________________________
>  Ros-dev mailing list
>  Ros-dev(a)reactos.org
>  http://www.reactos.org/mailman/listinfo/ros-dev
>
>