[PATCH v3 2/8] scripts/kallsyms: ensure that all possible combinations are compressed

From: Zhen Lei <thunder.leizhen@huawei.com>
To: Josh Poimboeuf <jpoimboe@kernel.org>,
	Jiri Kosina <jikos@kernel.org>, Miroslav Benes <mbenes@suse.cz>,
	Petr Mladek <pmladek@suse.com>,
	Joe Lawrence <joe.lawrence@redhat.com>,
	<live-patching@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Luis Chamberlain" <mcgrof@kernel.org>,
	<linux-modules@vger.kernel.org>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Subject: [PATCH v3 2/8] scripts/kallsyms: ensure that all possible combinations are compressed
Date: Mon, 19 Sep 2022 23:15:27 +0800	[thread overview]
Message-ID: <20220919151533.1734-3-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <20220919151533.1734-1-thunder.leizhen@huawei.com>

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 <thunder.leizhen@huawei.com>
---
 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

