From: Joao Martins joao.m.martins@oracle.com
virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IB7PU3 CVE: NA
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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 Acked-by: Will Deacon will@kernel.org Signed-off-by: Ankur Arora ankur.a.arora@oracle.com Signed-off-by: lishusen lishusen2@huawei.com --- arch/arm64/include/asm/thread_info.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 2dd890c8e4f8..379d24059f5b 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -76,6 +76,7 @@ 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 @@ -98,6 +99,7 @@ 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)