Commit-ID: b3a8cb18ce284b5c47517b681c42fcb9d8a99992 Gitweb: http://git.kernel.org/tip/b3a8cb18ce284b5c47517b681c42fcb9d8a99992 Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Fri, 11 Apr 2014 09:59:13 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 8 May 2014 09:16:54 +0200
sched/idle, tile: Switch from TS_POLLING to TIF_POLLING_NRFLAG Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word. This will allow us, using fetch_or(), to both set NEED_RESCHED and check for POLLING_NRFLAG in a single operation and avoid pointless wakeups. Changing from the non-atomic thread_info::status flags to the atomic thread_info::flags shouldn't be a big issue since most polling state changes were followed/preceded by a full memory barrier anyway. Signed-off-by: Peter Zijlstra <pet...@infradead.org> Acked-by: Chris Metcalf <cmetc...@tilera.com> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Chris Metcalf <cmetc...@tilera.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Link: http://lkml.kernel.org/n/tip-35zzwlvwr7cp8xj196y10...@git.kernel.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/tile/include/asm/thread_info.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/tile/include/asm/thread_info.h b/arch/tile/include/asm/thread_info.h index 729aa10..d767ff9 100644 --- a/arch/tile/include/asm/thread_info.h +++ b/arch/tile/include/asm/thread_info.h @@ -129,6 +129,7 @@ extern void _cpu_idle(void); #define TIF_MEMDIE 7 /* OOM killer at work */ #define TIF_NOTIFY_RESUME 8 /* callback before returning to user */ #define TIF_SYSCALL_TRACEPOINT 9 /* syscall tracepoint instrumentation */ +#define TIF_POLLING_NRFLAG 10 /* idle is polling for TIF_NEED_RESCHED */ #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) @@ -140,6 +141,7 @@ extern void _cpu_idle(void); #define _TIF_MEMDIE (1<<TIF_MEMDIE) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) +#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) /* Work to do on any return to user space. */ #define _TIF_ALLWORK_MASK \ @@ -162,7 +164,6 @@ extern void _cpu_idle(void); #ifdef __tilegx__ #define TS_COMPAT 0x0001 /* 32-bit compatibility mode */ #endif -#define TS_POLLING 0x0004 /* in idle loop but not sleeping */ #define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal */ #ifndef __ASSEMBLY__ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
