| Message ID | 20240830222844.1601170-8-ankur.a.arora@oracle.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Enable haltpoll on arm64 | expand |
On Fri, Aug 30, 2024 at 03:28:41PM -0700, Ankur Arora wrote: > From: Joao Martins <joao.m.martins@oracle.com> > > Commit 842514849a61 ("arm64: Remove TIF_POLLING_NRFLAG") had removed > TIF_POLLING_NRFLAG because arm64 only supported non-polled idling via > cpu_do_idle(). > > To add support for polling via cpuidle-haltpoll, we want to use the > standard poll_idle() interface, which sets TIF_POLLING_NRFLAG while > polling. > > Reuse the same bit to define TIF_POLLING_NRFLAG. > > Signed-off-by: Joao Martins <joao.m.martins@oracle.com> > Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com> > Reviewed-by: Christoph Lameter <cl@linux.com> > Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com> > --- > arch/arm64/include/asm/thread_info.h | 2 ++ > 1 file changed, 2 insertions(+) Acked-by: Will Deacon <will@kernel.org> Will
Will Deacon <will@kernel.org> writes: > On Fri, Aug 30, 2024 at 03:28:41PM -0700, Ankur Arora wrote: >> From: Joao Martins <joao.m.martins@oracle.com> >> >> Commit 842514849a61 ("arm64: Remove TIF_POLLING_NRFLAG") had removed >> TIF_POLLING_NRFLAG because arm64 only supported non-polled idling via >> cpu_do_idle(). >> >> To add support for polling via cpuidle-haltpoll, we want to use the >> standard poll_idle() interface, which sets TIF_POLLING_NRFLAG while >> polling. >> >> Reuse the same bit to define TIF_POLLING_NRFLAG. >> >> Signed-off-by: Joao Martins <joao.m.martins@oracle.com> >> Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com> >> Reviewed-by: Christoph Lameter <cl@linux.com> >> Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com> >> --- >> arch/arm64/include/asm/thread_info.h | 2 ++ >> 1 file changed, 2 insertions(+) > > Acked-by: Will Deacon <will@kernel.org> Thanks! -- ankur
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index e72a3bf9e563..23ff72168e48 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -69,6 +69,7 @@ void arch_setup_new_exec(void); #define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */ #define TIF_SECCOMP 11 /* syscall secure computing */ #define TIF_SYSCALL_EMU 12 /* syscall emulation active */ +#define TIF_POLLING_NRFLAG 16 /* set while polling in poll_idle() */ #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ #define TIF_FREEZE 19 #define TIF_RESTORE_SIGMASK 20 @@ -91,6 +92,7 @@ void arch_setup_new_exec(void); #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) +#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_UPROBE (1 << TIF_UPROBE) #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) #define _TIF_32BIT (1 << TIF_32BIT)