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authorHelge Deller <deller@gmx.de>2016-03-19 19:54:10 +0300
committerHelge Deller <deller@gmx.de>2016-03-23 17:44:34 +0300
commit6c31da3464b4d28825d1827ee41a3a217b2dcf0e (patch)
tree6d001021e7a1cdcc6e07e59e9d311720370d4fef /include
parent56649be9e67c17b4030fcc91ed6e1accc8e6918d (diff)
downloadlinux-6c31da3464b4d28825d1827ee41a3a217b2dcf0e.tar.xz
parisc,metag: Implement CONFIG_DEBUG_STACK_USAGE option
On parisc and metag the stack grows upwards, so for those we need to scan the stack downwards in order to calculate how much stack a process has used. Tested on a 64bit parisc kernel. Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/sched.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 34495d2d2d7b..589c4780b077 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2870,10 +2870,18 @@ static inline unsigned long stack_not_used(struct task_struct *p)
unsigned long *n = end_of_stack(p);
do { /* Skip over canary */
+# ifdef CONFIG_STACK_GROWSUP
+ n--;
+# else
n++;
+# endif
} while (!*n);
+# ifdef CONFIG_STACK_GROWSUP
+ return (unsigned long)end_of_stack(p) - (unsigned long)n;
+# else
return (unsigned long)n - (unsigned long)end_of_stack(p);
+# endif
}
#endif
extern void set_task_stack_end_magic(struct task_struct *tsk);