linux-kernel - [tip: core/objtool] objtool: Re-arrange validate

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Date:   Thu, 26 Mar 2020 10:08:31 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: core/objtool] objtool: Re-arrange validate_functions()

The following commit has been merged into the core/objtool branch of tip:

Commit-ID:     350994bf95414d6da67a72f27d7ac3832ce3725d
Gitweb:        https://git.kernel.org/tip/350994bf95414d6da67a72f27d7ac3832ce3725d
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Mon, 23 Mar 2020 20:57:13 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 25 Mar 2020 18:28:31 +01:00

objtool: Re-arrange validate_functions()

In preparation to adding a vmlinux.o specific pass, rearrange some
code. No functional changes intended.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Miroslav Benes <mbenes@...e.cz>
Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>
Link: https://lkml.kernel.org/r/20200324160924.924304616@infradead.org
---
 tools/objtool/check.c | 52 ++++++++++++++++++++++++------------------
 1 file changed, 30 insertions(+), 22 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 0c9c9ad..0bfcb39 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2395,9 +2395,8 @@ static bool ignore_unreachable_insn(struct instruction *insn)
 	return false;
 }
 
-static int validate_functions(struct objtool_file *file)
+static int validate_section(struct objtool_file *file, struct section *sec)
 {
-	struct section *sec;
 	struct symbol *func;
 	struct instruction *insn;
 	struct insn_state state;
@@ -2410,36 +2409,45 @@ static int validate_functions(struct objtool_file *file)
 	       CFI_NUM_REGS * sizeof(struct cfi_reg));
 	state.stack_size = initial_func_cfi.cfa.offset;
 
-	for_each_sec(file, sec) {
-		list_for_each_entry(func, &sec->symbol_list, list) {
-			if (func->type != STT_FUNC)
-				continue;
+	list_for_each_entry(func, &sec->symbol_list, list) {
+		if (func->type != STT_FUNC)
+			continue;
 
-			if (!func->len) {
-				WARN("%s() is missing an ELF size annotation",
-				     func->name);
-				warnings++;
-			}
+		if (!func->len) {
+			WARN("%s() is missing an ELF size annotation",
+			     func->name);
+			warnings++;
+		}
 
-			if (func->pfunc != func || func->alias != func)
-				continue;
+		if (func->pfunc != func || func->alias != func)
+			continue;
 
-			insn = find_insn(file, sec, func->offset);
-			if (!insn || insn->ignore || insn->visited)
-				continue;
+		insn = find_insn(file, sec, func->offset);
+		if (!insn || insn->ignore || insn->visited)
+			continue;
 
-			state.uaccess = func->uaccess_safe;
+		state.uaccess = func->uaccess_safe;
 
-			ret = validate_branch(file, func, insn, state);
-			if (ret && backtrace)
-				BT_FUNC("<=== (func)", insn);
-			warnings += ret;
-		}
+		ret = validate_branch(file, func, insn, state);
+		if (ret && backtrace)
+			BT_FUNC("<=== (func)", insn);
+		warnings += ret;
 	}
 
 	return warnings;
 }
 
+static int validate_functions(struct objtool_file *file)
+{
+	struct section *sec;
+	int warnings = 0;
+
+	for_each_sec(file, sec)
+		warnings += validate_section(file, sec);
+
+	return warnings;
+}
+
 static int validate_reachable_instructions(struct objtool_file *file)
 {
 	struct instruction *insn;