Clean asm/system.h from docs as nothing should refer to that header anymore.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
<sect1 id="routines-local-irqs">
<title><function>local_irq_save()</function>/<function>local_irq_restore()</function>
- <filename class="headerfile">include/asm/system.h</filename>
+ <filename class="headerfile">include/linux/irqflags.h</filename>
</title>
<para>
Architectures that want to support this need to do a couple of
code-organizational changes first:
-- move their irq-flags manipulation code from their asm/system.h header
- to asm/irqflags.h
-
-- rename local_irq_disable()/etc to raw_local_irq_disable()/etc. so that
- the linux/irqflags.h code can inject callbacks and can construct the
- real local_irq_disable()/etc APIs.
-
- add and enable TRACE_IRQFLAGS_SUPPORT in their arch level Kconfig file
and then a couple of functional changes are needed as well to implement
By default, the switch_to arch function is called with the runqueue
locked. This is usually not a problem unless switch_to may need to
take the runqueue lock. This is usually due to a wake up operation in
-the context switch. See arch/ia64/include/asm/system.h for an example.
+the context switch. See arch/ia64/include/asm/switch_to.h for an example.
To request the scheduler call switch_to with the runqueue unlocked,
you must `#define __ARCH_WANT_UNLOCKED_CTXSW` in a header file