x86, boot: Pass cmd_line_ptr with unsigned long instead

boot/compressed/misc.c is used for bzImage in 64bit and 32bit, and
cmd_line_ptr could point to buffer that is above 4g, cmd_line_ptr
should be 64bit otherwise high 32bit will be capped out.

So need to change data type to unsigned long, that will be 64bit get
correct address of command line buffer.

And it is still ok with 32bit bzImage, because unsigned long on 32bit kernel
is still 32bit.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-19-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 7fadf806f7ca928998575a142a19c0e2f97b06bd..5b7531966b8466e00ba6d909032ad9a9407e318a 100644 (file)
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -285,11 +285,11 @@ struct biosregs {
 void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg);
 
 /* cmdline.c */
-int __cmdline_find_option(u32 cmdline_ptr, const char *option, char *buffer, int bufsize);
-int __cmdline_find_option_bool(u32 cmdline_ptr, const char *option);
+int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *buffer, int bufsize);
+int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option);
 static inline int cmdline_find_option(const char *option, char *buffer, int bufsize)
 {
-       u32 cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
+       unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
 
        if (cmd_line_ptr >= 0x100000)
                return -1;      /* inaccessible */
@@ -299,7 +299,7 @@ static inline int cmdline_find_option(const char *option, char *buffer, int bufs
 
 static inline int cmdline_find_option_bool(const char *option)
 {
-       u32 cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
+       unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
 
        if (cmd_line_ptr >= 0x100000)
                return -1;      /* inaccessible */

diff --git a/arch/x86/boot/cmdline.c b/arch/x86/boot/cmdline.c
index 768f00f32469665b98b8d9a9c85ba4f3b0869f24..625d21b0cd3fd581449a6f23cc1ca59777ff82b3 100644 (file)
--- a/arch/x86/boot/cmdline.c
+++ b/arch/x86/boot/cmdline.c
@@ -27,7 +27,7 @@ static inline int myisspace(u8 c)
  * Returns the length of the argument (regardless of if it was
  * truncated to fit in the buffer), or -1 on not found.
  */
-int __cmdline_find_option(u32 cmdline_ptr, const char *option, char *buffer, int bufsize)
+int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *buffer, int bufsize)
 {
        addr_t cptr;
        char c;
@@ -99,7 +99,7 @@ int __cmdline_find_option(u32 cmdline_ptr, const char *option, char *buffer, int
  * Returns the position of that option (starts counting with 1)
  * or 0 on not found
  */
-int __cmdline_find_option_bool(u32 cmdline_ptr, const char *option)
+int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option)
 {
        addr_t cptr;
        char c;