[PATCH v9 03/27] kallsyms: add static relationship between `KSYM_NAME_LEN{,_BUFFER}`

Miguel Ojeda
2022-08-05T15:43:17Z

This adds a static assert to ensure `KSYM_NAME_LEN_BUFFER`
gets updated when `KSYM_NAME_LEN` changes.

The relationship used is one that keeps the new size (512+1)
close to the original buffer size (500).

Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
scripts/kallsyms.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index f3c5a2623f71..f543b1c4f99f 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -33,7 +33,11 @@
#define KSYM_NAME_LEN 128

/* A substantially bigger size than the current maximum. */
-#define KSYM_NAME_LEN_BUFFER 499
+#define KSYM_NAME_LEN_BUFFER 512
+_Static_assert(
+ KSYM_NAME_LEN_BUFFER == KSYM_NAME_LEN * 4,
+ "Please keep KSYM_NAME_LEN_BUFFER in sync with KSYM_NAME_LEN"
+);

struct sym_entry {
unsigned long long addr;
--
2.37.1