kdb: core for kgdb back end (2 of 2)

This patch contains the hooks and instrumentation into kernel which
live outside the kernel/debug directory, which the kdb core
will call to run commands like lsmod, dmesg, bt etc...

CC: mort@sgi.com
CC: linux-arch@vger.kernel.org
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 6c0585b16418..dc2039edef00 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -13,6 +13,7 @@
 #include <linux/swap.h>
 #include <linux/vmalloc.h>
 #include <linux/pagemap.h>
+#include <linux/kdb.h>
 #include <linux/namei.h>
 #include <linux/shm.h>
 #include <linux/blkdev.h>
@@ -2056,12 +2057,11 @@ out:
 	return error;
 }
 
-void si_swapinfo(struct sysinfo *val)
+void __si_swapinfo(struct sysinfo *val)
 {
 	unsigned int type;
 	unsigned long nr_to_be_unused = 0;
 
-	spin_lock(&swap_lock);
 	for (type = 0; type < nr_swapfiles; type++) {
 		struct swap_info_struct *si = swap_info[type];
 
@@ -2070,6 +2070,12 @@ void si_swapinfo(struct sysinfo *val)
 	}
 	val->freeswap = nr_swap_pages + nr_to_be_unused;
 	val->totalswap = total_swap_pages + nr_to_be_unused;
+}
+
+void si_swapinfo(struct sysinfo *val)
+{
+	spin_lock(&swap_lock);
+	__si_swapinfo(val);
 	spin_unlock(&swap_lock);
 }