linux-kernel - Re: [Announce] Unified x86 architecture, arch/x86

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Date:	Thu, 23 Aug 2007 08:51:17 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...l.org>, Andi Kleen <ak@...e.de>,
	Ingo Molnar <mingo@...e.hu>,
	Chris Wright <chrisw@...s-sol.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [Announce] Unified x86 architecture, arch/x86 - V2

On Wed, 22 Aug 2007 23:56:22 +0200
Thomas Gleixner <tglx@...utronix.de> wrote:

> We are pleased to announce v2 of the unified arch/x86 project we are 
> working on.
> 
> To recap: the core idea behind our project is simple to describe: we 
> introduce a new arch/x86/ and include/asm-x86/ file hierarchy that 
> includes all the existing 32-bit and 64-bit x86 code and allows the 
> building of either a 32-bit (i386) kernel or a 64-bit (x86_64)
> kernel. No code is lost and almost no code is modified. We want the
> window for regressions and tree incompatibilities to be zero. (The
> full initial announcement can be found at
> http://lkml.org/lkml/2007/7/20/447)
> 

as said before I like this a lot ;)

there's still some low hanging fruit left:

[arjan@...topd505 x86]$ for i in */*_32.c */*/*_32.c ; do perl same_function.pl $i ; done 
Identical function: crypto/aes_32.c - aes_fini 
Identical function: crypto/aes_32.c - aes_encrypt
Identical function: crypto/aes_32.c - aes_init    
Identical function: crypto/aes_32.c - aes_decrypt
Identical function: kernel/apic_32.c - init_lapic_sysfs
Identical function: kernel/hpet_32.c - read_hpet 
Identical function: kernel/io_apic_32.c - io_apic_base
Identical function: kernel/io_apic_32.c - irq_polarity 
Identical function: kernel/io_apic_32.c - ioapic_read_entry
Identical function: kernel/io_apic_32.c - ioapic_init_sysfs
Identical function: kernel/io_apic_32.c - irq_trigger 
Identical function: kernel/io_apic_32.c - ioapic_mask_entry
Identical function: kernel/io_apic_32.c - find_irq_entry    
Identical function: kernel/io_apic_32.c - io_apic_write  
Identical function: kernel/io_apic_32.c - io_apic_read  
Identical function: kernel/io_apic_32.c - startup_ioapic_irq
Identical function: kernel/io_apic_32.c - ioapic_write_entry 
Identical function: kernel/kprobes_32.c - arch_disarm_kprobe 
Identical function: kernel/kprobes_32.c - arch_arm_kprobe   
Identical function: kernel/ldt_32.c - read_ldt 
Identical function: kernel/ldt_32.c - copy_ldt 
Identical function: kernel/ldt_32.c - flush_ldt
Identical function: kernel/mpparse_32.c - mpf_checksum
Identical function: kernel/nmi_32.c - lapic_nmi_resume 
Identical function: kernel/nmi_32.c - lapic_nmi_suspend 
Identical function: kernel/nmi_32.c - __acpi_nmi_disable
Identical function: kernel/pci-dma_32.c - via_no_dac    
Identical function: kernel/process_32.c - play_dead  
Identical function: kernel/setup_32.c - copy_edd      
Identical function: mm/fault_32.c - notify_page_fault
Identical function: mm/pageattr_32.c - flush_map 
Identical function: boot/compressed/misc_32.c - putstr
Identical function: boot/compressed/misc_32.c - scroll
Identical function: boot/compressed/misc_32.c - memcpy 
Identical function: boot/compressed/misc_32.c - free   
Identical function: boot/compressed/misc_32.c - memset 
Identical function: boot/compressed/misc_32.c - error  
Identical function: boot/compressed/misc_32.c - flush_window
Identical function: boot/compressed/misc_32.c - fill_inbuf  
Identical function: boot/compressed/misc_32.c - gzip_mark    
Identical function: kernel/acpi/sleep_32.c - acpi_sleep_setup


I'll get someone in my team to investigate merging these in the next few days and send patches to you for them.
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