summaryrefslogtreecommitdiff
path: root/arch/s390
diff options
context:
space:
mode:
authorChristian Borntraeger <borntraeger@de.ibm.com>2017-11-23 19:26:20 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-11-24 14:28:34 +0100
commit860ec7c6e21cecca8c508a66ee211b56d87f5bd7 (patch)
tree375847e608aa9dbe1c10abcd1a143a5bbb1c1b98 /arch/s390
parent53c4ab70c11c3ba1b9e3caa8e8c17e9c16d9cbc0 (diff)
s390/debug: use pK for kernel pointers
the s390 debug feature (/sys/kernel/debug/s390dbf/) shows the kernel pointer of the calling function even for kptr_restrict == 2. Let us use pK instead of p. This hides the kernel addresses for kptr_restrict == 2: root@host $ echo 2 > /proc/sys/kernel/kptr_restrict root@host $ tail -n1 /sys/kernel/debug/s390dbf/cio_msg/sprintf 00 01511461280:386645 2 - 00 0000000000000000 snsid: device 0.0.3f68: rc=0 3990/e9 3390/0c root@host $ echo 1 > /proc/sys/kernel/kptr_restrict root@host $ tail -n1 /sys/kernel/debug/s390dbf/cio_msg/sprintf 00 01511461280:386645 2 - 00 000000000071171c snsid: device 0.0.3f68: rc=0 3990/e9 3390/0c root@host $ echo 0 > /proc/sys/kernel/kptr_restrict root@host $ tail -n1 /sys/kernel/debug/s390dbf/cio_msg/sprintf 00 01511461280:386645 2 - 00 000000000071171c snsid: device 0.0.3f68: rc=0 3990/e9 3390/0c Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/debug.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 58b9e127b615..80e974adb9e8 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -1392,7 +1392,7 @@ int debug_dflt_header_fn(debug_info_t *id, struct debug_view *view,
else
except_str = "-";
caller = (unsigned long) entry->caller;
- rc += sprintf(out_buf, "%02i %011ld:%06lu %1u %1s %02i %p ",
+ rc += sprintf(out_buf, "%02i %011ld:%06lu %1u %1s %02i %pK ",
area, sec, usec, level, except_str,
entry->id.fields.cpuid, (void *)caller);
return rc;