batostr() function

8 messages, 6 authors, 2012-05-08 · open the first message on its own page

batostr() function

From: Johannes Berg <johannes@sipsolutions.net>
Date: 2012-05-07 11:49:43

Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...

johannes

Re: batostr() function

From: David Herrmann <hidden>
Date: 2012-05-08 13:30:39

Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref] wrote:
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
johannes
Regards
David

Re: batostr() function

From: Ulisses Furquim <hidden>
Date: 2012-05-08 14:20:37

Hi David,

On Tue, May 8, 2012 at 10:30 AM, David Herrmann
[off-list ref] wrote:
Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref]
wrote:
quoted
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
Thanks for fixing it. I'm sure we haven't noticed but it's still weird
to have it this way. :-/

Regards,

--
Ulisses Furquim
ProFUSION embedded systems
http://profusion.mobi
Mobile: +55 19 9250 0942
Skype: ulissesffs

Re: batostr() function

From: Johannes Berg <johannes@sipsolutions.net>
Date: 2012-05-08 14:25:08

On Tue, 2012-05-08 at 15:30 +0200, David Herrmann wrote:
Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref] wrote:
quoted
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
I was thinking you could use %pM, but it seems BT addresses are stored
the wrong way around for some reason ...

johannes

Re: batostr() function

From: Andrei Emeltchenko <hidden>
Date: 2012-05-08 14:30:12

On Tue, May 08, 2012 at 04:25:08PM +0200, Johannes Berg wrote:
On Tue, 2012-05-08 at 15:30 +0200, David Herrmann wrote:
quoted
Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref] wrote:
quoted
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
I was thinking you could use %pM, but it seems BT addresses are stored
the wrong way around for some reason ...
This looks like better idea then allocating buffers, we can use swap to
take care about "wrong order".

Best regards 
Andrei Emeltchenko 

Re: batostr() function

From: Joe Perches <joe@perches.com>
Date: 2012-05-08 17:18:52

On Tue, 2012-05-08 at 17:30 +0300, Andrei Emeltchenko wrote:
On Tue, May 08, 2012 at 04:25:08PM +0200, Johannes Berg wrote:
quoted
On Tue, 2012-05-08 at 15:30 +0200, David Herrmann wrote:
quoted
Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref] wrote:
quoted
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
I was thinking you could use %pM, but it seems BT addresses are stored
the wrong way around for some reason ...
This looks like better idea then allocating buffers, we can use swap to
take care about "wrong order".
https://lkml.org/lkml/2010/12/3/358

Re: batostr() function

From: Johannes Berg <johannes@sipsolutions.net>
Date: 2012-05-08 17:48:33

On Tue, 2012-05-08 at 10:18 -0700, Joe Perches wrote:
On Tue, 2012-05-08 at 17:30 +0300, Andrei Emeltchenko wrote:
quoted
On Tue, May 08, 2012 at 04:25:08PM +0200, Johannes Berg wrote:
quoted
On Tue, 2012-05-08 at 15:30 +0200, David Herrmann wrote:
quoted
Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref] wrote:
quoted
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
I was thinking you could use %pM, but it seems BT addresses are stored
the wrong way around for some reason ...
This looks like better idea then allocating buffers, we can use swap to
take care about "wrong order".
https://lkml.org/lkml/2010/12/3/358
Pretty much what I had in mind, thanks. Luis, you'll notice that this
will be a pain to backport in compat. :-)

johannes

Re: batostr() function

From: Luis R. Rodriguez <hidden>
Date: 2012-05-08 18:26:53

On Tue, May 8, 2012 at 10:48 AM, Johannes Berg
[off-list ref] wrote:
On Tue, 2012-05-08 at 10:18 -0700, Joe Perches wrote:
quoted
On Tue, 2012-05-08 at 17:30 +0300, Andrei Emeltchenko wrote:
quoted
On Tue, May 08, 2012 at 04:25:08PM +0200, Johannes Berg wrote:
quoted
On Tue, 2012-05-08 at 15:30 +0200, David Herrmann wrote:
quoted
Hi Johannes

On Mon, May 7, 2012 at 1:49 PM, Johannes Berg [off-list ref] wrote:
quoted
Really? 2 static buffers that are used alternately based on a static
variable? How can that possibly be thread-safe? That may work in very
restricted scenarios, but ...
Looking at "git blame" it seems the whole function is still from
linux-2.4. Looks like no-one ever noticed. I've sent a patchset fixing
it, thanks.
I was thinking you could use %pM, but it seems BT addresses are stored
the wrong way around for some reason ...
This looks like better idea then allocating buffers, we can use swap to
take care about "wrong order".
https://lkml.org/lkml/2010/12/3/358
Pretty much what I had in mind, thanks. Luis, you'll notice that this
will be a pain to backport in compat. :-)
Mumble grumble. Oh well! :) I'm starting to enjoy the curve balls.

  Luis
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