[Crash-utility] [PATCH v2 1/2] dynamically allocate schedulers_buf

[Nikola Pajkovsky]

crash can simply determinate length of xen schedulers struct.

  static const struct scheduler *schedulers[] = {
  	 ...
  };

Signed-off-by: Nikola Pajkovsky <npajkovsky at suse.cz>
---
 xen_hyper.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/xen_hyper.c b/xen_hyper.c
index 27e44c6e733d..479aa1acfd43 100644
--- a/xen_hyper.c
+++ b/xen_hyper.c
@@ -435,7 +435,6 @@ xen_hyper_misc_init(void)
 /*
  * Do initialization for scheduler of Xen Hyper system here.
  */
-#define XEN_HYPER_SCHEDULERS_ARRAY_CNT 10
 #define XEN_HYPER_SCHEDULER_NAME 1024
 
 static void
@@ -443,7 +442,8 @@ xen_hyper_schedule_init(void)
 {
 	ulong addr, opt_sched, schedulers, opt_name;
 	long scheduler_opt_name;
-	long schedulers_buf[XEN_HYPER_SCHEDULERS_ARRAY_CNT];
+	long *schedulers_buf;
+	int nr_schedulers;
 	struct xen_hyper_sched_context *schc;
 	char *buf;
 	char opt_name_buf[XEN_HYPER_OPT_SCHED_SIZE];
@@ -469,15 +469,17 @@ xen_hyper_schedule_init(void)
 	XEN_HYPER_OPT_SCHED_SIZE, "opt_sched,", RETURN_ON_ERROR)) {
 		error(FATAL, "cannot read opt_sched,.\n");
 	}
+	nr_schedulers = get_array_length("schedulers", 0, 0);
+	schedulers_buf = (long *)GETBUF(nr_schedulers * sizeof(long));
 	schedulers = symbol_value("schedulers");
 	addr = schedulers;
 	while (xhscht->name == NULL) {
 		if (!readmem(addr, KVADDR, schedulers_buf,
-		sizeof(long) * XEN_HYPER_SCHEDULERS_ARRAY_CNT,
-		"schedulers", RETURN_ON_ERROR)) {
+			     sizeof(long) * nr_schedulers,
+			     "schedulers", RETURN_ON_ERROR)) {
 			error(FATAL, "cannot read schedulers.\n");
 		}
-		for (i = 0; i < XEN_HYPER_SCHEDULERS_ARRAY_CNT; i++) {
+		for (i = 0; i < nr_schedulers; i++) {
 			if (schedulers_buf[i] == 0) {
 				error(FATAL, "schedule data not found.\n");
 			}
@@ -514,9 +516,10 @@ xen_hyper_schedule_init(void)
 			strncpy(xhscht->name, buf, strlen(buf));
 			break;
 		}
-		addr += sizeof(long) * XEN_HYPER_SCHEDULERS_ARRAY_CNT;
+		addr += sizeof(long) * nr_schedulers;
 	}
 	FREEBUF(buf);
+	FREEBUF(schedulers_buf);
 
 	/* get schedule_data information */
 	if((xhscht->sched_context_array =
-- 
2.13.6