• Anton Blanchard's avatar
    powerpc: check_and_cede_processor() never cedes · 0b17ba72
    Anton Blanchard authored
    Commit f948501b ("Make hard_irq_disable() actually hard-disable
    interrupts") caused check_and_cede_processor to stop working.
    ->irq_happened will never be zero right after a hard_irq_disable
    so the compiler removes the call to cede_processor completely.
    The bug was introduced back in the lazy interrupt handling rework
    of 3.4 but was hidden until recently because hard_irq_disable did
    This issue will eventually appear in 3.4 stable since the
    hard_irq_disable fix is marked stable, so mark this one for stable
    Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
hw_irq.h 4.41 KB