GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-28 17:41:50 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

irq: initialize nr_irqs based on nr_cpu_ids

Browse source 
Impact: Reduce memory usage.

This is the second half of the changes to make the irq_desc_ptrs be
variable sized based on nr_cpu_ids.  This is done by adding a new
"max_nr_irqs" macro to irq_vectors.h (and a dummy in irqnr.h) to
return a max NR_IRQS value based on NR_CPUS or nr_cpu_ids.

This necessitated moving the define of MAX_IO_APICS to a separate
file (asm/apicnum.h) so it could be included without the baggage
of the other asm/apicdef.h declarations.

Signed-off-by: Mike Travis <travis@sgi.com>
This commit is contained in:
Mike Travis 2009-01-10 22:24:07 -08:00 • committed by Ingo Molnar
parent 0fa0ebbf15
commit 9332fccded
5 changed files with 35 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

7
include/linux/irqnr.h
View file

@ -20,11 +20,18 @@
# define for_each_irq_desc_reverse(irq, desc) \
for (irq = nr_irqs - 1; irq >= 0; irq--)
#else /* CONFIG_GENERIC_HARDIRQS */
#include <asm/irq_vectors.h> /* need possible max_nr_irqs() */
extern int nr_irqs;
extern struct irq_desc *irq_to_desc(unsigned int irq);
# ifndef max_nr_irqs
# define max_nr_irqs(nr_cpus) NR_IRQS
# endif
# define for_each_irq_desc(irq, desc) \
for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs; \
irq++, desc = irq_to_desc(irq)) \