From 330b58368ca16c31efdadcf8263f7f903546af50 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 15 Mar 2016 19:34:20 +0100 Subject: [PATCH] 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 Signed-off-by: Markus Armbruster Reviewed-by: Paolo Bonzini Message-Id: <1458066895-20632-6-git-send-email-armbru@redhat.com> --- default-configs/pci.mak | 2 +- tests/Makefile | 2 +- util/event_notifier-posix.c | 6 ++++++ 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/default-configs/pci.mak b/default-configs/pci.mak index 4fa9a28ef6..9c8bc68c4c 100644 --- a/default-configs/pci.mak +++ b/default-configs/pci.mak @@ -36,5 +36,5 @@ CONFIG_SDHCI=y CONFIG_EDU=y CONFIG_VGA=y CONFIG_VGA_PCI=y -CONFIG_IVSHMEM=$(CONFIG_POSIX) +CONFIG_IVSHMEM=$(CONFIG_EVENTFD) CONFIG_ROCKER=y diff --git a/tests/Makefile b/tests/Makefile index cd4bbd41ad..3cb951dcc6 100644 --- a/tests/Makefile +++ b/tests/Makefile @@ -161,7 +161,7 @@ gcov-files-pci-y += hw/display/virtio-gpu-pci.c gcov-files-pci-$(CONFIG_VIRTIO_VGA) += hw/display/virtio-vga.c check-qtest-pci-y += tests/intel-hda-test$(EXESUF) gcov-files-pci-y += hw/audio/intel-hda.c hw/audio/hda-codec.c -check-qtest-pci-$(CONFIG_POSIX) += tests/ivshmem-test$(EXESUF) +check-qtest-pci-$(CONFIG_EVENTFD) += tests/ivshmem-test$(EXESUF) gcov-files-pci-y += hw/misc/ivshmem.c check-qtest-i386-y = tests/endianness-test$(EXESUF) diff --git a/util/event_notifier-posix.c b/util/event_notifier-posix.c index 2e30e74bd6..c9657a61ae 100644 --- a/util/event_notifier-posix.c +++ b/util/event_notifier-posix.c @@ -20,11 +20,17 @@ #include #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) { -- GitLab