Module Name:	src
Committed By:	bouyer
Date:		Wed May  3 20:22:34 UTC 2006

Modified Files:
	src/sys/arch/xen/xen: xencons.c

Log Message:
Fix a race between xenconscn_getc() and xencons_handler() (which seems to be
triggered by recent xen3 hypervisor or tools): check sc->polling in
xencons_handler() and just return if set. Also, run xenconscn_getc() and putc()
at spltty().
While there, mark xencons_interface as volatile and use __UNVOLATILE() where
appropriate; and update the pointers in xencons_handler() if xenconscn_getc()
changed them (avoids replaying ddb commands in shell if ddb got called
by the magic string).


To generate a diff of this commit:
cvs rdiff -r1.14 -r1.15 src/sys/arch/xen/xen/xencons.c

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