On Tue, Jan 05, 2016 at 05:33:34PM +0000, Mark Rutland wrote: > In work_pending we may skip work if the stacked SPSR value represents > anything other than an EL0 context. We then immediately invoke the > kernel_exit 0 macro as part of ret_to_user, assuming a return to EL0. > This is somewhat confusing. > > We use work_pending as part of the ret_to_user/ret_fast_syscall state > machine. We only use ret_fast_syscall in the return from an SVC issued > from EL0. We use ret_to_user for return from EL0 exception handlers and > also for return from ret_from_fork in the case the task was not a kernel > thread (i.e. it is a user task). > > Thus in all cases the stacked SPSR value must represent an EL0 context, > and the check is redundant. This patch removes it, along with the now > unused no_work_pending label. > > Signed-off-by: Mark Rutland <[email protected]> > Cc: Catalin Marinas <[email protected]> > Cc: Chris Metcalf <[email protected]> > Cc: Will Deacon <[email protected]>
Acked-by: Catalin Marinas <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
