CVS commit: src/sys/arch/sh3/include

["Valeriy E. Ushakov" <uwe%netbsd.org@localhost>]

Module Name:    src
Committed By:   uwe
Date:           Tue Oct 13 12:55:53 UTC 2009

Modified Files:
        src/sys/arch/sh3/include: lock.h

Log Message:
Fix inline asm for tas.b.  "=m" is not restrictive enough and gcc may
decide to use addressing modes that tas.b does not support.  'V' is
advertised to be "non-offsettable" subset of 'm' but there's a bug in
gcc that prevents "=V" from working.

When in doubt use brute force, so pass lock pointer as "r" input and
declare "memory" as clobbered.

Landisk kernel diff is 5 instructions (register choice for lock
address in __cpu_simple_lock_try).

sys/dev/raidframe/rf_copyback.c - where old __asm triggered incorrect code
- successfully compiles (as part of sys/rump/dev/lib/libraidframe).


To generate a diff of this commit:
cvs rdiff -u -r1.15 -r1.16 src/sys/arch/sh3/include/lock.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.