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    Subject[PATCH v2 2/7] powerpc: Use TIDR CPU feature to control TIDR allocation
    Date
    From: Alastair D'Silva <alastair@d-silva.org>

    Switch the use of TIDR on it's CPU feature, rather than assuming it
    is available based on architecture.

    Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
    ---
    arch/powerpc/kernel/process.c | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
    index 1237f13fed51..3b00da47699b 100644
    --- a/arch/powerpc/kernel/process.c
    +++ b/arch/powerpc/kernel/process.c
    @@ -1154,7 +1154,7 @@ static inline void restore_sprs(struct thread_struct *old_thread,
    mtspr(SPRN_TAR, new_thread->tar);
    }

    - if (cpu_has_feature(CPU_FTR_ARCH_300) &&
    + if (cpu_has_feature(CPU_FTR_P9_TIDR) &&
    old_thread->tidr != new_thread->tidr)
    mtspr(SPRN_TIDR, new_thread->tidr);
    #endif
    @@ -1570,7 +1570,7 @@ void clear_thread_tidr(struct task_struct *t)
    if (!t->thread.tidr)
    return;

    - if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
    + if (!cpu_has_feature(CPU_FTR_P9_TIDR)) {
    WARN_ON_ONCE(1);
    return;
    }
    @@ -1593,7 +1593,7 @@ int set_thread_tidr(struct task_struct *t)
    {
    int rc;

    - if (!cpu_has_feature(CPU_FTR_ARCH_300))
    + if (!cpu_has_feature(CPU_FTR_P9_TIDR))
    return -EINVAL;

    if (t != current)
    --
    2.14.3
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