linux/arch/ppc, branch v2.6.25.5

[PPC] 8xx: swap bug-fix

2008-03-07T22:56:54Z

This makes swap routines operate correctly on the ppc_8xx based machines. Recent kernel's size makes swap feature very important on low-memory platfor those are actually non-operable without it. Signed-off-by: Yuri Tikhonov Signed-off-by: Kumar Gala

[POWERPC] PPC440EP Interrupt Triggering and Level Settings

2008-02-16T03:33:02Z

Corrected IRQ triggering and level settings according to latest revision of the 440EP User Manual (rev 1.24 nov 16, 2007). The incorrect settings might cause a failure of the network if both onchip ethernet ports are under heavy load. Signed-off-by: Wolfgang Ocker Acked-by: Stefan Roese Signed-off-by: Josh Boyer

ide: introduce HAVE_IDE

2008-02-09T09:46:40Z

To allow flexible configuration of IDE introduce HAVE_IDE. All archs except arm, um and s390 unconditionally select it. For arm the actual configuration determine if IDE is supported. This is a step towards introducing drivers/Kconfig for arm. Signed-off-by: Sam Ravnborg Acked-by: Russell King - ARM Linux Acked-by: Bartlomiej Zolnierkiewicz

CONFIG_HIGHPTE vs. sub-page page tables.

2008-02-08T17:22:42Z

Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

procfs: constify function pointer tables

2008-02-08T17:22:38Z

Signed-off-by: Jan Engelhardt Acked-by: Geert Uytterhoeven Acked-by: Mike Frysinger Acked-By: David Howells Acked-by: Bryan Wu Acked-by: Jesper Nilsson Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scheduled OSS driver removal

2008-02-06T18:41:02Z

This patch contains the scheduled removal of OSS drivers whose config options have been removed in 2.6.23. Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

remove support for un-needed _extratext section

2008-02-06T18:41:01Z

When passing a zero address to kallsyms_lookup(), the kernel thought it was a valid kernel address, even if it is not. This is because is_ksym_addr() called is_kernel_extratext() and checked against labels that don't exist on many archs (which default as zero). Since PPC was the only kernel which defines _extra_text, (in 2005), and no longer needs it, this patch removes _extra_text support. For some history (provided by Jon): http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019734.html http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019736.html http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019751.html [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Robin Getz Cc: David Woodhouse Cc: Jon Loeliger Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: Sam Ravnborg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Remove pointless casts from void pointers

2008-02-06T18:41:01Z

Mostly in and around irq handlers. Signed-off-by: Jeff Garzik Cc: Russell King Cc: "Luck Tony" Cc: Roman Zippel Cc: Geert Uytterhoeven Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Acked-by: Dmitry Torokhov Cc: Karsten Keil Acked-by: "John W. Linville" Cc: James Bottomley Cc: David Brownell Cc: "Antonino A. Daplas" Acked-by: Josh Boyer Acked-by: Holger Schurig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

add mm argument to pte/pmd/pud/pgd_free

2008-02-05T17:44:18Z

(with Martin Schwidefsky ) The pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as first argument. The free functions do not get the mm_struct argument. This is 1) asymmetrical and 2) to do mm related page table allocations the mm argument is needed on the free function as well. [kamalesh@linux.vnet.ibm.com: i386 fix] [akpm@linux-foundation.org: coding-syle fixes] Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Martin Schwidefsky Cc: Signed-off-by: Kamalesh Babulal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Move Kconfig.instrumentation to arch/Kconfig and init/Kconfig

2008-02-03T07:58:08Z

Move the instrumentation Kconfig to arch/Kconfig for architecture dependent options - oprofile - kprobes and init/Kconfig for architecture independent options - profiling - markers Remove the "Instrumentation Support" menu. Everything moves to "General setup". Delete the kernel/Kconfig.instrumentation file. Signed-off-by: Mathieu Desnoyers Cc: Linus Torvalds Cc: Signed-off-by: Sam Ravnborg