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Message-ID: <20070307071049.GJ23412@in.ibm.com> Date: Wed, 7 Mar 2007 12:40:49 +0530 From: Vivek Goyal <vgoyal@...ibm.com> To: linux kernel mailing list <linux-kernel@...r.kernel.org> Cc: Reloc Kernel List <fastboot@...ts.osdl.org>, ebiederm@...ssion.com, akpm@...ux-foundation.org, ak@...e.de, hpa@...or.com, magnus.damm@...il.com, lwang@...hat.com, dzickus@...hat.com, pavel@...e.cz, rjw@...k.pl Subject: [PATCH 9/20] x86_64: Get rid of dead code in suspend resume o Get rid of dead code in wakeup.S o We never restore from saved_gdt, saved_idt, saved_ltd, saved_tss, saved_cr3, saved_cr4, saved_cr0, real_save_gdt, saved_efer, saved_efer2. Get rid of of associated code. o Get rid of bogus_magic, bogus_31_magic and bogus_magic2. No longer being used. Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com> Signed-off-by: Vivek Goyal <vgoyal@...ibm.com> --- arch/x86_64/kernel/acpi/wakeup.S | 57 --------------------------------------- 1 file changed, 1 insertion(+), 56 deletions(-) diff -puN arch/x86_64/kernel/acpi/wakeup.S~x86_64-get-rid-of-dead-code-in-suspend-resume arch/x86_64/kernel/acpi/wakeup.S --- linux-2.6.21-rc2-reloc/arch/x86_64/kernel/acpi/wakeup.S~x86_64-get-rid-of-dead-code-in-suspend-resume 2007-03-07 01:26:21.000000000 +0530 +++ linux-2.6.21-rc2-reloc-root/arch/x86_64/kernel/acpi/wakeup.S 2007-03-07 01:26:21.000000000 +0530 @@ -258,8 +258,6 @@ gdt_48a: .word 0, 0 # gdt base (filled in later) -real_save_gdt: .word 0 - .quad 0 real_magic: .quad 0 video_mode: .quad 0 video_flags: .quad 0 @@ -272,10 +270,6 @@ bogus_32_magic: movb $0xb3,%al ; outb %al,$0x80 jmp bogus_32_magic -bogus_31_magic: - movb $0xb1,%al ; outb %al,$0x80 - jmp bogus_31_magic - bogus_cpu: movb $0xbc,%al ; outb %al,$0x80 jmp bogus_cpu @@ -346,16 +340,6 @@ check_vesaa: _setbada: jmp setbada - .code64 -bogus_magic: - movw $0x0e00 + 'B', %ds:(0xb8018) - jmp bogus_magic - -bogus_magic2: - movw $0x0e00 + '2', %ds:(0xb8018) - jmp bogus_magic2 - - wakeup_stack_begin: # Stack grows down .org 0xff0 @@ -373,28 +357,11 @@ ENTRY(wakeup_end) # # Returned address is location of code in low memory (past data and stack) # + .code64 ENTRY(acpi_copy_wakeup_routine) pushq %rax - pushq %rcx pushq %rdx - sgdt saved_gdt - sidt saved_idt - sldt saved_ldt - str saved_tss - - movq %cr3, %rdx - movq %rdx, saved_cr3 - movq %cr4, %rdx - movq %rdx, saved_cr4 - movq %cr0, %rdx - movq %rdx, saved_cr0 - sgdt real_save_gdt - wakeup_start (,%rdi) - movl $MSR_EFER, %ecx - rdmsr - movl %eax, saved_efer - movl %edx, saved_efer2 - movl saved_video_mode, %edx movl %edx, video_mode - wakeup_start (,%rdi) movl acpi_video_flags, %edx @@ -407,17 +374,8 @@ ENTRY(acpi_copy_wakeup_routine) cmpl $0x9abcdef0, %eax jne bogus_32_magic - # make sure %cr4 is set correctly (features, etc) - movl saved_cr4 - __START_KERNEL_map, %eax - movq %rax, %cr4 - - movl saved_cr0 - __START_KERNEL_map, %eax - movq %rax, %cr0 - jmp 1f # Flush pipelines -1: # restore the regs we used popq %rdx - popq %rcx popq %rax ENTRY(do_suspend_lowlevel_s4bios) ret @@ -512,16 +470,3 @@ ENTRY(saved_eip) .quad 0 ENTRY(saved_esp) .quad 0 ENTRY(saved_magic) .quad 0 - -ALIGN -# saved registers -saved_gdt: .quad 0,0 -saved_idt: .quad 0,0 -saved_ldt: .quad 0 -saved_tss: .quad 0 - -saved_cr0: .quad 0 -saved_cr3: .quad 0 -saved_cr4: .quad 0 -saved_efer: .quad 0 -saved_efer2: .quad 0 _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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