ternary vs double exclamation

John de la Garza john at jjdev.com
Sun Jan 4 18:43:22 EST 2015

On Sat, Jan 03, 2015 at 11:20:29PM -0500, Valdis.Kletnieks at vt.edu wrote:
> On Sat, 03 Jan 2015 18:54:00 -0500, John de la Garza said:
> > It should not be assumed that true will always be 1 as defined in
> > include/linux/stddef.h, right?
> No, I mean use an actual 'bool' type rather than 'int'.  Consider this from
> kernel/softirq.c:

yes, bool has two possible values true and false

from include/linux/stddef.h:
enum {
	        false   = 0,
		true	= 1

I assume it is a bad idea to depend on true being 1, right?  I mean, I
should assume that true could be changed to any non 0 value in the future,

More information about the Kernelnewbies mailing list