Thread (25 messages) 25 messages, 2 authors, 2022-09-30
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[PATCH v4 2/8] scripts/kallsyms: ensure that all possible combinations are compressed

From: Zhen Lei <hidden>
Date: 2022-09-20 07:14:34
Also in: live-patching, lkml
Subsystem: the rest · Maintainer: Linus Torvalds

For a symbol, there may be more than one place that can be merged. For
example: nfs_fs_proc_net_init, there are two "f"+"s_" combinations.
And we're only compressing the first combination at the moment. Let's
compress all possible combinations.

Signed-off-by: Zhen Lei <redacted>
---
 scripts/kallsyms.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 8caccc8f4a23703..3319d9f38d7a5f2 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -553,7 +553,7 @@ static void compress_symbols(const unsigned char *str, int idx)
 	unsigned char *p1, *p2;
 
 	for (i = 0; i < table_cnt; i++) {
-
+retry:
 		len = table[i]->len;
 		p1 = table[i]->sym;
 
@@ -585,6 +585,9 @@ static void compress_symbols(const unsigned char *str, int idx)
 
 		/* increase the counts for this symbol's new tokens */
 		learn_symbol(table[i]->sym, len);
+
+		/* May be more than one place that can be merged, try again */
+		goto retry;
 	}
 }
 
-- 
2.25.1
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