On Wed, 18 Nov 2009, Sven-Thorsten Dietrich wrote: > We are trying to get rid of __sched_yield calls from-inside-the-Kernel, > but sys_sched_yield() from user-space will remain. > > This patch breaks out the in-Kernel interface for the yield() > functionality and deprecates it explicitly. > > The sys_sched_yield() variety, however is not deprecated. > > The objective is to deprecate *only* the in-kernel calls to > sched_yield(), in hopes of reducing new calls to sched_yield() being > added. Nothing in the kernel calls sched_yield() because there is no such function. > Eventually, when the in-Kernel calls are gone, the __sched_yield() would > be removed, and the first 2 hunks would essentially be reverted, leaving > only the user-space caller sys_sched_yield. > > For the time being we add 2 lines and 2 braces of bulk, in hopes that > elsewhere this eliminates more __sched_yield() calls being added while > we work to eliminate the ones that exist already. Err ? WTF do you need to fiddle in sched.c to deprecate a function ? Nothing in the kernel calls sys_sched_yield() except the syscall and the implementation of yield() in sched.c. The drivers,... call yield() nothing else. To deprecate yield() all you need is adding __deprecated to the function prototype in sched.h. And that's the only way you alert users because it warns when compiling code which _calls_ yield() not when compiling the implementation in sched.c. Sigh, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
