[PATCH 1/3] x86: pass in size to early cmdline parsing

[Dave Hansen]

From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

We will use this in a few patches to implement tests for early
parsing.

Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: fenghua.yu@xxxxxxxxx
Cc: yu-cheng.yu@xxxxxxxxx
---

 b/arch/x86/lib/cmdline.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff -puN arch/x86/lib/cmdline.c~pass-in-cmdline-size arch/x86/lib/cmdline.c
--- a/arch/x86/lib/cmdline.c~pass-in-cmdline-size	2015-12-17 13:54:52.534928192 -0800
+++ b/arch/x86/lib/cmdline.c	2015-12-17 13:54:52.537928328 -0800
@@ -23,7 +23,8 @@ static inline int myisspace(u8 c)
  * Returns the position of that @option (starts counting with 1)
  * or 0 on not found.
  */
-int cmdline_find_option_bool(const char *cmdline, const char *option)
+static int __cmdline_find_option_bool(const char *cmdline,
+		int max_cmdline_size, const char *option)
 {
 	char c;
 	int len, pos = 0, wstart = 0;
@@ -37,7 +38,7 @@ int cmdline_find_option_bool(const char
 	if (!cmdline)
 		return -1;      /* No command line */
 
-	len = min_t(int, strlen(cmdline), COMMAND_LINE_SIZE);
+	len = min_t(int, strlen(cmdline), max_cmdline_size);
 	if (!len)
 		return 0;
 
@@ -82,3 +83,9 @@ int cmdline_find_option_bool(const char
 
 	return 0;	/* Buffer overrun */
 }
+
+int cmdline_find_option_bool(const char *cmdline, const char *option)
+{
+	return __cmdline_find_option_bool(cmdline, COMMAND_LINE_SIZE,
+			option);
+}
_
--
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