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    Subject[PATCH 6.0 618/862] powerpc/64/interrupt: Fix false warning in context tracking due to idle state
    Date
    From: Nicholas Piggin <npiggin@gmail.com>

    [ Upstream commit 56adbb7a8b6cc7fc9b940829c38494e53c9e57d1 ]

    Commit 171476775d32 ("context_tracking: Convert state to atomic_t")
    added a CONTEXT_IDLE state which can be encountered by interrupts from
    kernel mode in the idle thread, causing a false positive warning.

    Fixes: 171476775d32 ("context_tracking: Convert state to atomic_t")
    Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
    Link: https://lore.kernel.org/r/20220926054305.2671436-2-npiggin@gmail.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/powerpc/include/asm/interrupt.h | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
    index 8069dbc4b8d1..b61555e30c7c 100644
    --- a/arch/powerpc/include/asm/interrupt.h
    +++ b/arch/powerpc/include/asm/interrupt.h
    @@ -195,7 +195,8 @@ static inline void interrupt_enter_prepare(struct pt_regs *regs)
    * so avoid recursion.
    */
    if (TRAP(regs) != INTERRUPT_PROGRAM) {
    - CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
    + CT_WARN_ON(ct_state() != CONTEXT_KERNEL &&
    + ct_state() != CONTEXT_IDLE);
    if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
    BUG_ON(is_implicit_soft_masked(regs));
    }
    --
    2.35.1


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