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x86/boot: Pass in size to early cmdline parsing

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

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
[ Aligned args properly. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: fenghua.yu@intel.com
Cc: yu-cheng.yu@intel.com
Link: http://lkml.kernel.org/r/20151222225243.5CC47EB6@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Dave Hansen 2015-12-22 14:52:43 -08:00 committed by Ingo Molnar
parent 4de07ea481
commit 8c0517759a
1 changed files with 9 additions and 2 deletions
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11
arch/x86/lib/cmdline.c
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@ -25,7 +25,9 @@ static inline int myisspace(u8 c)
* as an entire word in @cmdline. For instance, if @option="car"
* then a cmdline which contains "cart" will not match.
*/
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 pos = 0, wstart = 0;
@ -43,7 +45,7 @@ int cmdline_find_option_bool(const char *cmdline, const char *option)
* This 'pos' check ensures we do not overrun
* a non-NULL-terminated 'cmdline'
*/
while (pos < COMMAND_LINE_SIZE) {
while (pos < max_cmdline_size) {
c = *(char *)cmdline++;
pos++;
@ -101,3 +103,8 @@ int cmdline_find_option_bool(const char *cmdline, const char *option)
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);
}