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| author | Markus Armbruster <armbru@redhat.com> | 2016-03-15 19:34:20 +0100 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2016-03-21 21:28:59 +0100 |
| commit | 330b58368ca16c31efdadcf8263f7f903546af50 (patch) | |
| tree | 312ec2338bd7d0b6c2953a2e5dde097a2ee82e7d /util/event_notifier-posix.c | |
| parent | ad4929384b64ffc9908915fd40cb80f455835d4a (diff) | |
| download | qemu-330b58368ca16c31efdadcf8263f7f903546af50.zip qemu-330b58368ca16c31efdadcf8263f7f903546af50.tar.gz qemu-330b58368ca16c31efdadcf8263f7f903546af50.tar.bz2 | |
event_notifier: Make event_notifier_init_fd() #ifdef CONFIG_EVENTFD
Event notifiers are designed for eventfd(2). They can fall back to
pipes, but according to Paolo, event_notifier_init_fd() really
requires the real thing, and should therefore be under #ifdef
CONFIG_EVENTFD. Do that.
Its only user is ivshmem, which is currently CONFIG_POSIX. Narrow it
to CONFIG_EVENTFD.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1458066895-20632-6-git-send-email-armbru@redhat.com>
Diffstat (limited to 'util/event_notifier-posix.c')
| -rw-r--r-- | util/event_notifier-posix.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/util/event_notifier-posix.c b/util/event_notifier-posix.c index 2e30e74..c9657a6 100644 --- a/util/event_notifier-posix.c +++ b/util/event_notifier-posix.c @@ -20,11 +20,17 @@ #include <sys/eventfd.h> #endif +#ifdef CONFIG_EVENTFD +/* + * Initialize @e with existing file descriptor @fd. + * @fd must be a genuine eventfd object, emulation with pipe won't do. + */ void event_notifier_init_fd(EventNotifier *e, int fd) { e->rfd = fd; e->wfd = fd; } +#endif int event_notifier_init(EventNotifier *e, int active) { |