summaryrefslogtreecommitdiffstats
path: root/kernel/irq
diff options
context:
space:
mode:
authorDimitri Sivanich <sivanich@sgi.com>2010-03-11 14:08:56 -0800
committerThomas Gleixner <tglx@linutronix.de>2010-03-24 14:10:03 +0100
commit92d6b71ab906be706f3679353b30a8d2c3831144 (patch)
tree2b82cc7f065f947f4a6430e0de3bc63a4870907d /kernel/irq
parent220bf991b0366cc50a94feede3d7341fa5710ee4 (diff)
downloadlinux-92d6b71ab906be706f3679353b30a8d2c3831144.tar.gz
linux-92d6b71ab906be706f3679353b30a8d2c3831144.tar.bz2
linux-92d6b71ab906be706f3679353b30a8d2c3831144.zip
genirq: Expose irq_desc->node in proc/irq
Expose irq_desc->node as /proc/irq/*/node. This file provides device hardware locality information for apps desiring to include hardware locality in irq mapping decisions. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/proc.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 6f50eccc79c0..e346e08f5c34 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -146,6 +146,26 @@ static const struct file_operations default_affinity_proc_fops = {
.release = single_release,
.write = default_affinity_write,
};
+
+static int irq_node_proc_show(struct seq_file *m, void *v)
+{
+ struct irq_desc *desc = irq_to_desc((long) m->private);
+
+ seq_printf(m, "%d\n", desc->node);
+ return 0;
+}
+
+static int irq_node_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, irq_node_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations irq_node_proc_fops = {
+ .open = irq_node_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
#endif
static int irq_spurious_proc_show(struct seq_file *m, void *v)
@@ -230,6 +250,9 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
/* create /proc/irq/<irq>/smp_affinity */
proc_create_data("smp_affinity", 0600, desc->dir,
&irq_affinity_proc_fops, (void *)(long)irq);
+
+ proc_create_data("node", 0444, desc->dir,
+ &irq_node_proc_fops, (void *)(long)irq);
#endif
proc_create_data("spurious", 0444, desc->dir,