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-rw-r--r--lib/test_printf.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/lib/test_printf.c b/lib/test_printf.c
index cea592f402ed..53527ea822b5 100644
--- a/lib/test_printf.c
+++ b/lib/test_printf.c
@@ -206,6 +206,7 @@ test_string(void)
#define PTR_WIDTH 16
#define PTR ((void *)0xffff0123456789abUL)
#define PTR_STR "ffff0123456789ab"
+#define PTR_VAL_NO_CRNG "(____ptrval____)"
#define ZEROS "00000000" /* hex 32 zero bits */
static int __init
@@ -216,7 +217,16 @@ plain_format(void)
nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);
- if (nchars != PTR_WIDTH || strncmp(buf, ZEROS, strlen(ZEROS)) != 0)
+ if (nchars != PTR_WIDTH)
+ return -1;
+
+ if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
+ pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
+ PTR_VAL_NO_CRNG);
+ return 0;
+ }
+
+ if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0)
return -1;
return 0;
@@ -227,6 +237,7 @@ plain_format(void)
#define PTR_WIDTH 8
#define PTR ((void *)0x456789ab)
#define PTR_STR "456789ab"
+#define PTR_VAL_NO_CRNG "(ptrval)"
static int __init
plain_format(void)
@@ -245,7 +256,16 @@ plain_hash(void)
nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);
- if (nchars != PTR_WIDTH || strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
+ if (nchars != PTR_WIDTH)
+ return -1;
+
+ if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
+ pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
+ PTR_VAL_NO_CRNG);
+ return 0;
+ }
+
+ if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
return -1;
return 0;