linux-kernel - [PATCH] x86/boot/KASLR: Change the function type to void

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Date:   Tue, 7 Aug 2018 09:57:05 +0800
From:   Chao Fan <fanc.fnst@...fujitsu.com>
To:     <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
        <x86@...nel.org>, <kirill.shutemov@...ux.intel.com>,
        <bhe@...hat.com>, <linux-kernel@...r.kernel.org>
CC:     <douly.fnst@...fujitsu.com>, Chao Fan <fanc.fnst@...fujitsu.com>
Subject: [PATCH] x86/boot/KASLR: Change the function type to void

Since function "handle_mem_options" is used only once:
arch/x86/boot/compressed/kaslr.c:421
	handle_mem_options();
The return value is useless, so change it to void.

And also clean a useless variable.

Suggested-by: Dou Liyang <douly.fnst@...fujitsu.com>
Signed-off-by: Chao Fan <fanc.fnst@...fujitsu.com>
---
 arch/x86/boot/compressed/kaslr.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 302517929932..78724caadcfb 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -244,7 +244,7 @@ static void parse_gb_huge_pages(char *param, char *val)
 }
 
 
-static int handle_mem_options(void)
+static void handle_mem_options(void)
 {
 	char *args = (char *)get_cmd_line_ptr();
 	size_t len = strlen((char *)args);
@@ -254,7 +254,7 @@ static int handle_mem_options(void)
 
 	if (!strstr(args, "memmap=") && !strstr(args, "mem=") &&
 		!strstr(args, "hugepages"))
-		return 0;
+		return;
 
 	tmp_cmdline = malloc(len + 1);
 	if (!tmp_cmdline)
@@ -272,8 +272,7 @@ static int handle_mem_options(void)
 		/* Stop at -- */
 		if (!val && strcmp(param, "--") == 0) {
 			warn("Only '--' specified in cmdline");
-			free(tmp_cmdline);
-			return -1;
+			goto out;
 		}
 
 		if (!strcmp(param, "memmap")) {
@@ -286,16 +285,16 @@ static int handle_mem_options(void)
 			if (!strcmp(p, "nopentium"))
 				continue;
 			mem_size = memparse(p, &p);
-			if (mem_size == 0) {
-				free(tmp_cmdline);
-				return -EINVAL;
-			}
+			if (mem_size == 0)
+				goto out;
+
 			mem_limit = mem_size;
 		}
 	}
 
+out:
 	free(tmp_cmdline);
-	return 0;
+	return;
 }
 
 /*
@@ -581,7 +580,6 @@ static void process_mem_region(struct mem_vector *entry,
 			       unsigned long image_size)
 {
 	struct mem_vector region, overlap;
-	struct slot_area slot_area;
 	unsigned long start_orig, end;
 	struct mem_vector cur_entry;
 
-- 
2.17.1