diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2009-11-17 01:01:34 -0800 |
---|---|---|
committer | Eric W. Biederman <ebiederm@xmission.com> | 2009-11-17 01:01:34 -0800 |
commit | bb9074ff58fe745e4f244f76209241909c82ec9c (patch) | |
tree | cf6be00ab88b1e315f6b74a896a370440f677599 /drivers/char | |
parent | 4739a9748e1bd7459f22f7e94e7d85710ca83954 (diff) | |
parent | 156171c71a0dc4bce12b4408bb1591f8fe32dc1a (diff) | |
download | linux-bb9074ff58fe745e4f244f76209241909c82ec9c.tar.bz2 |
Merge commit 'v2.6.32-rc7'
Resolve the conflict between v2.6.32-rc7 where dn_def_dev_handler
gets a small bug fix and the sysctl tree where I am removing all
sysctl strategy routines.
Diffstat (limited to 'drivers/char')
-rw-r--r-- | drivers/char/hvc_xen.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c index eba999f8598d..a6ee32b599a8 100644 --- a/drivers/char/hvc_xen.c +++ b/drivers/char/hvc_xen.c @@ -55,7 +55,7 @@ static inline void notify_daemon(void) notify_remote_via_evtchn(xen_start_info->console.domU.evtchn); } -static int write_console(uint32_t vtermno, const char *data, int len) +static int __write_console(const char *data, int len) { struct xencons_interface *intf = xencons_interface(); XENCONS_RING_IDX cons, prod; @@ -76,6 +76,29 @@ static int write_console(uint32_t vtermno, const char *data, int len) return sent; } +static int write_console(uint32_t vtermno, const char *data, int len) +{ + int ret = len; + + /* + * Make sure the whole buffer is emitted, polling if + * necessary. We don't ever want to rely on the hvc daemon + * because the most interesting console output is when the + * kernel is crippled. + */ + while (len) { + int sent = __write_console(data, len); + + data += sent; + len -= sent; + + if (unlikely(len)) + HYPERVISOR_sched_op(SCHEDOP_yield, NULL); + } + + return ret; +} + static int read_console(uint32_t vtermno, char *buf, int len) { struct xencons_interface *intf = xencons_interface(); |