lkml.org 
[lkml]   [2005]   [Nov]   [30]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateWed, 30 Nov 2005 13:45:09 +0100
FromAndi Kleen <>
SubjectRe: [PATCH 0/9] x86-64 put current in r10
> Your patch breaks all out-of-tree amd64 assembler code used in kernel. r10
> register is one of those registers that does not need to be preserved across
> function calls, and reserving that register for other purpose means that all
> assembler code using r10 in kernel must be rewritten. This is deeply
> unfunny.

Well, the changes should be minor.

> 
> Please don't apply Ben's patch. It is already bad enough having to deal with
> two incompatible calling conventions on 32 bit x86.

43KB .text savings are hard to argue against. There is no guarantee
for a stable kernel ABI. If you maintain out of tree code you 
will need to live with the occasional changes.

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-11-30 12:49    [from the cache]
©2003-2008