Re: [PATCH 04/13] qemu-kvm: Remove eventfd compat header

Michael S. Tsirkin
2011-07-03T09:57:25Z

On Sun, Jul 03, 2011 at 12:54:06PM +0300, Michael S. Tsirkin wrote:
> On Sun, Jul 03, 2011 at 11:46:51AM +0200, Bernhard Held wrote:
> > #ifndef _COMPAT_SYS_EVENTFD
> > #define _COMPAT_SYS_EVENTFD
> >
> > #include <unistd.h>
> > #include <syscall.h>
> >
> > /* Flags for signalfd. */
> > enum
> > {
> > EFD_SEMAPHORE = 1,
> > #define EFD_SEMAPHORE EFD_SEMAPHORE
> > EFD_CLOEXEC = 02000000,
> > #define EFD_CLOEXEC EFD_CLOEXEC
> > EFD_NONBLOCK = 04000
> > #define EFD_NONBLOCK EFD_NONBLOCK
> > };
> >
> > #ifndef __NR_eventfd2
> > #if defined(__x86_64__)
> > #define __NR_eventfd2 290
> > #elif defined(__i386__)
> > #define __NR_eventfd2 328
> > #else
> > #error Cannot detect your architecture!
> > #endif
> > #endif
>
> Can't we use SYS_eventfd2 instead?

Looks like we can't, but __NR_eventfd2
does seem to exit?

> > static inline int eventfd (int count, int flags)
> > {
> > return syscall(__NR_eventfd2, count, flags);
> > }
> >
> > #endif
> >
>