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docs: locking: Add 'need' to hardirq section 

Add the missing word to make this sentence read properly.

Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20200318174133.160206-2-swboyd@chromium.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
5.9.x+fslc
Stephen Boyd 2020-03-18 10:41:32 -07:00 committed by Jonathan Corbet
parent 769f90f8a9
commit 6adb775599
1 changed files with 1 additions and 1 deletions
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Documentation/kernel-hacking/locking.rst
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@ -263,7 +263,7 @@ by a hardware interrupt on another CPU. This is where
interrupts on that cpu, then grab the lock.
:c:func:`spin_unlock_irq()` does the reverse.
The irq handler does not to use :c:func:`spin_lock_irq()`, because
The irq handler does not need to use :c:func:`spin_lock_irq()`, because
the softirq cannot run while the irq handler is running: it can use
:c:func:`spin_lock()`, which is slightly faster. The only exception
would be if a different hardware irq handler uses the same lock: