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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-07-30 16:03:45 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-07-30 16:03:46 +0930 |
| commit | a91d74a3c4de8115295ee87350c13a329164aaaf (patch) | |
| tree | 02c862fccc9abedf7fc354061e69c4b5fbcce06d /drivers/lguest/core.c | |
| parent | 2e04ef76916d1e29a077ea9d0f2003c8fd86724d (diff) | |
| download | op-kernel-dev-a91d74a3c4de8115295ee87350c13a329164aaaf.zip op-kernel-dev-a91d74a3c4de8115295ee87350c13a329164aaaf.tar.gz | |
lguest: update commentry
Every so often, after code shuffles, I need to go through and unbitrot
the Lguest Journey (see drivers/lguest/README). Since we now use RCU in
a simple form in one place I took the opportunity to expand that explanation.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'drivers/lguest/core.c')
| -rw-r--r-- | drivers/lguest/core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c index cd058bc..1e2cb84 100644 --- a/drivers/lguest/core.c +++ b/drivers/lguest/core.c @@ -217,10 +217,15 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) /* * It's possible the Guest did a NOTIFY hypercall to the - * Launcher, in which case we return from the read() now. + * Launcher. */ if (cpu->pending_notify) { + /* + * Does it just needs to write to a registered + * eventfd (ie. the appropriate virtqueue thread)? + */ if (!send_notify_to_eventfd(cpu)) { + /* OK, we tell the main Laucher. */ if (put_user(cpu->pending_notify, user)) return -EFAULT; return sizeof(cpu->pending_notify); |
