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| author | Mikulas Patocka | 2018-07-25 15:41:57 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz | 2018-07-25 15:41:57 +0200 |
| commit | cb782a3fa952478177341e67275885ae52340f99 (patch) | |
| tree | 51e77534b367491c679d4c0e15db6a51dff62d55 /kernel/printk | |
| parent | udlfb: avoid prefetch (diff) | |
| download | kernel-qcow2-linux-cb782a3fa952478177341e67275885ae52340f99.tar.gz kernel-qcow2-linux-cb782a3fa952478177341e67275885ae52340f99.tar.xz kernel-qcow2-linux-cb782a3fa952478177341e67275885ae52340f99.zip | |
udlfb: use spin_lock_irq instead of spin_lock_irqsave
spin_lock_irqsave and spin_unlock_irqrestore is inteded to be called from
a context where it is unknown if interrupts are enabled or disabled (such
as interrupt handlers). From a process context, we should call
spin_lock_irq and spin_unlock_irq, that avoids the costly pushf and popf
instructions.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'kernel/printk')
0 files changed, 0 insertions, 0 deletions