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Date: Tue, 22 Mar 2016 15:31:58 +0800 From: Baoquan He <bhe@...hat.com> To: linux-kernel@...r.kernel.org Cc: yinghai@...nel.org, keescook@...omium.org, hpa@...or.com, mingo@...hat.com, bp@...en8.de, vgoyal@...hat.com, luto@...nel.org, lasse.collin@...aani.org, akpm@...ux-foundation.org, dyoung@...hat.com Subject: [PATCH v4 01/20] x86, kaslr: Remove not needed parameter for choose_kernel_location From: Yinghai Lu <yinghai@...nel.org> real_mode is global variable, so we do not need to pass it around. Signed-off-by: Yinghai Lu <yinghai@...nel.org> Acked-by: Kees Cook <keescook@...omium.org> --- arch/x86/boot/compressed/aslr.c | 5 ++--- arch/x86/boot/compressed/misc.c | 2 +- arch/x86/boot/compressed/misc.h | 6 ++---- 3 files changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/x86/boot/compressed/aslr.c b/arch/x86/boot/compressed/aslr.c index 6a9b96b..622aa88 100644 --- a/arch/x86/boot/compressed/aslr.c +++ b/arch/x86/boot/compressed/aslr.c @@ -295,8 +295,7 @@ static unsigned long find_random_addr(unsigned long minimum, return slots_fetch_random(); } -unsigned char *choose_kernel_location(struct boot_params *boot_params, - unsigned char *input, +unsigned char *choose_kernel_location(unsigned char *input, unsigned long input_size, unsigned char *output, unsigned long output_size) @@ -316,7 +315,7 @@ unsigned char *choose_kernel_location(struct boot_params *boot_params, } #endif - boot_params->hdr.loadflags |= KASLR_FLAG; + real_mode->hdr.loadflags |= KASLR_FLAG; /* Record the various known unsafe memory ranges. */ mem_avoid_init((unsigned long)input, input_size, diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 79dac17..f35ad9e 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -428,7 +428,7 @@ asmlinkage __visible void *decompress_kernel(void *rmode, memptr heap, * the entire decompressed kernel plus relocation table, or the * entire decompressed kernel plus .bss and .brk sections. */ - output = choose_kernel_location(real_mode, input_data, input_len, output, + output = choose_kernel_location(input_data, input_len, output, output_len > run_size ? output_len : run_size); diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index 3783dc3..dcf01c2 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -67,8 +67,7 @@ int cmdline_find_option_bool(const char *option); #if CONFIG_RANDOMIZE_BASE /* aslr.c */ -unsigned char *choose_kernel_location(struct boot_params *boot_params, - unsigned char *input, +unsigned char *choose_kernel_location(unsigned char *input, unsigned long input_size, unsigned char *output, unsigned long output_size); @@ -76,8 +75,7 @@ unsigned char *choose_kernel_location(struct boot_params *boot_params, bool has_cpuflag(int flag); #else static inline -unsigned char *choose_kernel_location(struct boot_params *boot_params, - unsigned char *input, +unsigned char *choose_kernel_location(unsigned char *input, unsigned long input_size, unsigned char *output, unsigned long output_size) -- 2.5.0
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