From 3db07e70f0b4742f8daeda5c4aa8fbe7aeb3799e Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Thu, 24 Jan 2013 12:19:59 -0800 Subject: [PATCH] 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 Link: http://lkml.kernel.org/r/1359058816-7615-19-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin --- arch/x86/boot/boot.h | 8 ++++---- arch/x86/boot/cmdline.c | 4 ++-- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h index 7fadf80..5b75319 100644 --- 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 768f00f..625d21b 100644 --- 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; -- 2.7.4