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Fix: btrfs_delayed_ref_head was unwired since v3.12
[lttng-modules.git]
/
probes
/
lttng-probe-user.c
diff --git
a/probes/lttng-probe-user.c
b/probes/lttng-probe-user.c
index e92107d94cfbd1948eb3773deb6c55a228f48505..099a66b229a46fcc90f7b5fd7e504a3806d7d0e6 100644
(file)
--- a/
probes/lttng-probe-user.c
+++ b/
probes/lttng-probe-user.c
@@
-31,8
+31,12
@@
long lttng_strlen_user_inatomic(const char *addr)
{
long count = 0;
- mm_segment_t old_fs
= get_fs()
;
+ mm_segment_t old_fs;
+ if (!addr)
+ return 0;
+
+ old_fs = get_fs();
set_fs(KERNEL_DS);
pagefault_disable();
for (;;) {
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