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| author | Sebastian Andrzej Siewior <[email protected]> | 2020-08-13 12:50:26 +0200 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2020-08-13 14:11:54 +0200 |
| commit | a6d996cbd38b42341ad3fce74506b9fdc280e395 (patch) | |
| tree | cee30c2db877ebcd6b10cafced5d9f62a888ee0f /drivers/gpu/drm/omapdrm/omap_crtc.c | |
| parent | f29dfa53cc8ae6ad93bae619bcc0bf45cab344f7 (diff) | |
x86/alternatives: Acquire pte lock with interrupts enabled
pte lock is never acquired in-IRQ context so it does not require interrupts
to be disabled. The lock is a regular spinlock which cannot be acquired
with interrupts disabled on RT.
RT complains about pte_lock() in __text_poke() because it's invoked after
disabling interrupts.
__text_poke() has to disable interrupts as use_temporary_mm() expects
interrupts to be off because it invokes switch_mm_irqs_off() and uses
per-CPU (current active mm) data.
Move the PTE lock handling outside the interrupt disabled region.
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by; Peter Zijlstra (Intel) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_crtc.c')
0 files changed, 0 insertions, 0 deletions