Kbuild: Handle longer symbols in kallsyms.c

Also warn for too long symbols

v2: Add missing newline. Use 255 max (Joe Perches)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 7 insertions, 1 deletions

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 487ac6f37ca2..967522ab4f39 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -27,7 +27,7 @@
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
 #endif
 
-#define KSYM_NAME_LEN           128
+#define KSYM_NAME_LEN           255
 
 struct sym_entry {
         unsigned long long addr;
@@ -111,6 +111,12 @@ static int read_symbol(FILE *in, struct sym_entry *s)
                         fprintf(stderr, "Read error or end of file.\n");
                 return -1;
         }
+        if (strlen(str) > KSYM_NAME_LEN) {
+                fprintf(stderr, "Symbol %s too long for kallsyms (%lu vs %d).\n"
+                                "Please increase KSYM_NAME_LEN both in kernel and kallsyms.c\n",
+                        str, strlen(str), KSYM_NAME_LEN);
+                return -1;
+        }
 
         sym = str;
         /* skip prefix char */