Re: [patch] update perf_event_open() for Linux 3.19

On Wed, Feb 04, 2015 at 03:41:17PM -0500, Vince Weaver wrote:
 > On Wed, 4 Feb 2015, Dave Jones wrote:
 > 
 > > On Tue, Feb 03, 2015 at 12:01:23PM -0500, Vince Weaver wrote:
 > > 
 > > 
 > >  > @@ -237,6 +238,7 @@ enum perf_event_read_format {
 > >  >  #define PERF_ATTR_SIZE_VER2	80	/* add: branch_sample_type */
 > >  >  #define PERF_ATTR_SIZE_VER3	96	/* add: sample_regs_user */
 > >  >  					/* add: sample_stack_user */
 > >  > +#define PERF_ATTR_SIZE_VER4	104	/* add: sample_regs_intr */
 > > 
 > > I've not given this a lot of thought before, but I'm assuming these
 > > are the 64-bit struct sizes.  It might be interesting to also
 > > throw some 32-bit sizes in the mix.  Who knows what horrors
 > > lie in wait for the compat syscalls.
 > 
 > I might be misunderstanding, but I think the attr structure is defined in 
 > a way that it has the same size on 32 and 64 bit.

ah, ok. Yeah, now that I look at the struct definition, it's all
u32/u64's, so this is the same size on both archs.

	Dave