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* arch/m68k/mm/sun3mmu.c: Eliminate NULL test and memset after alloc_bootmemJulia Lawall2008-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As noted by Akinobu Mita in patch b1fceac2b9e04d278316b2faddf276015fc06e3b, alloc_bootmem and related functions never return NULL and always return a zeroed region of memory. Thus a NULL test or memset after calls to these functions is unnecessary. This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; statement S; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) .. when != E ( - BUG_ON (E == NULL); | - if (E == NULL) S ) @@ expression E,E1; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) .. when != E - memset(E,0,E1); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch/m68k/mm/motorola.c: Eliminate NULL test and memset after alloc_bootmemJulia Lawall2008-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As noted by Akinobu Mita in patch b1fceac2b9e04d278316b2faddf276015fc06e3b, alloc_bootmem and related functions never return NULL and always return a zeroed region of memory. Thus a NULL test or memset after calls to these functions is unnecessary. This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; statement S; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) .. when != E ( - BUG_ON (E == NULL); | - if (E == NULL) S ) @@ expression E,E1; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) .. when != E - memset(E,0,E1); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/Atari: remove the dead ATARI_SCC{,_DMA} optionsAdrian Bunk2008-07-20
| | | | | | | | | | It seems the driver was removed back in kernel 2.3 but the options were forgotten. Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/Mac: remove the unused ADB_KEYBOARD optionAdrian Bunk2008-07-20
| | | | | | | | | When the driver was removed back in 2002 the option was forgotten. Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/apollo: Add missing call to apollo_parse_bootinfo()Geert Uytterhoeven2008-07-20
| | | | | | | | | | Add the missing call to apollo_parse_bootinfo(), which had been lost from a big Apollo support patch by Peter De Schrijver in 1999. Thanks to Adrian Bunk for noticing! Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/sun3/: possible cleanupsAdrian Bunk2008-07-20
| | | | | | | | | | | | | | | | | This patch contains the following possible cleanups: - make the following needlessly global code static: - config.c: sun3_bootmem_alloc() - config.c: sun3_sched_init() - dvma.c: dvma_page() - idprom.c: struct Sun_Machines[] - mmu_emu.c: struct ctx_alloc[] - sun3dvma.c: iommu_use[] - sun3ints.c: led_pattern[] - remove the unused sbus.c Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/q40/config.c: make functions staticAdrian Bunk2008-07-20
| | | | | | | | | | | | | | | This patch makes the following needlessly global functions static: - q40_reset() - q40_halt() - q40_disable_irqs() - q40_gettimeoffset() - q40_hwclk() - q40_get_ss() - q40_set_clock_mmss() Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/mac/: possible cleanupsAdrian Bunk2008-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch contains the following possible cleanups: - make the following needlessly global code (always) static: - baboon.c: struct baboon - baboon.c: baboon_irq() - config.c: mac_orig_videoaddr - config.c: mac_identify() - config.c: mac_report_hardware() - config.c: mac_debug_console_write() - config.c: mac_sccb_console_write() - config.c: mac_scca_console_write() - config.c: mac_init_scc_port() - oss.c: oss_irq() - oss.c: oss_nubus_irq() - psc.c: psc_debug_dump() - psc.c: psc_dma_die_die_die() - via.c: rbv_clear - remove the unused bootparse.c - #if 0 the following unused functions: - config.c: mac_debugging_short() - config.c: mac_debugging_long() - remove the following unused code: - config.c: mac_bisize - config.c: mac_env - config.c: mac_SCC_init_done - config.c: mac_SCC_reset_done - config.c: mac_init_scca_port() - config.c: mac_init_sccb_port() Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/atari/debug.c: possible cleanupsAdrian Bunk2008-07-20
| | | | | | | | | | | | | | | | | | | | | | This patch contains the following possible cleanups: - make the following needlessly global functions (always) static: - atari_mfp_console_write() - atari_scc_console_write() - atari_midi_console_write() - atari_init_mfp_port() - atari_init_scc_port() - atari_init_midi_port() - #if 0 the following unused functions: - atari_mfp_console_wait_key() - atari_scc_console_wait_key() - atari_midi_console_wait_key() - remove the following unused variables: - atari_MFP_init_done - atari_SCC_init_done Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k/amiga/: possible cleanupsAdrian Bunk2008-07-20
| | | | | | | | | | | | | | | | | | | | This patch contains the following possible cleanups: - amiints.c: add a proper prototype for amiga_init_IRQ() in include/asm-m68k/amigaints.h - make the following needlessly global code static: - config.c: amiga_model - config.c: amiga_psfreq - config.c: amiga_serial_console_write() - #if 0 the following unused functions: - config.c: amiga_serial_puts() - config.c: amiga_serial_console_wait_key() - config.c: amiga_serial_gets() - remove the following unused variable: - config.c: amiga_masterclock Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* export amiga_vblankAdrian Bunk2008-07-20
| | | | | | | | | | | | | | | | | | | | This patch fixes the following build error: <-- snip --> .. Building modules, stage 2. MODPOST 1203 modules ERROR: "amiga_vblank" [drivers/video/amifb.ko] undefined! .. make[2]: *** [__modpost] Error 1 <-- snip --> Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: remove AP1000 codeAdrian Bunk2008-07-20
| | | | | | | | | | Unless I miss something that's code for a sparc machine even the sparc code no longer supports that got copied to m68k when these files were copied. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: make multi_defconfig the default defconfigAdrian Bunk2008-07-20
| | | | | | | | | It seems to match the intention behind multi_defconfig to make it the default defconfig. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Stringify support commasMathieu Desnoyers2008-07-20
| | | | | | | | | | | | > This is a no-no for those archs that still use -traditional. > > I dunno if this is a problem for you at the moment and the > > right fix is anyway to nuke -traditional. > > > > Sam Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: Allow no CPU/platform type for allnoconfigGeert Uytterhoeven2008-07-20
| | | | | | | | | | | | | | Allow no CPU/platform type for allnoconfig - Provide a dummy value for FPSTATESIZE if no CPU type was selected - Provide a dummy value for NR_IRQS if no platform type was selected - Warn the user if no CPU or platform type was selected Note: you still cannot build an allnoconfig kernel, as CONFIG_SWAP=n doesn't build and we cannot easily fix that (http://groups.google.com/group/linux.kernel/browse_thread/thread/d430c78b07e1827b) Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: vmlinux-std/sun3.lds.S cleanup - use PAGE_SIZE macroCyrill Gorcunov2008-07-20
| | | | | | | | | This patch includes page.h header into linker script that allow us to use PAGE_SIZE macro instead of numeric constant Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: remove CVS keywordsAdrian Bunk2008-07-20
| | | | | | | | | This patch removes CVS keywords that weren't updated for a long time from comments. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge commit 'v2.6.26' into bkl-removalJonathan Corbet2008-07-14
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| * m68k: enable CONFIG_COMPAT_BRK by defaultGeert Uytterhoeven2008-06-06
| | | | | | | | | | | | | | | | | | As some m68k machines have plenty of libc5 binaries in active use, enable CONFIG_COMPAT_BRK by default. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * provide out-of-line strcat() for m68kAl Viro2008-05-21
| | | | | | | | | | | | | | | | | | | | Whether we sidestep it in init/main.c or not, such situations will arise again; compiler does generate calls of strcat() on optimizations, so we really ought to have an out-of-line version... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * Merge branch 'for-linus' of ↵Linus Torvalds2008-05-19
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: [PATCH] return to old errno choice in mkdir() et.al. [Patch] fs/binfmt_elf.c: fix wrong return values [PATCH] get rid of leak in compat_execve() [Patch] fs/binfmt_elf.c: fix a wrong free [PATCH] avoid multiplication overflows and signedness issues for max_fds [PATCH] dup_fd() part 4 - race fix [PATCH] dup_fd() - part 3 [PATCH] dup_fd() part 2 [PATCH] dup_fd() fixes, part 1 [PATCH] take init_files to fs/file.c
| | * [PATCH] take init_files to fs/file.cAl Viro2008-05-16
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | mvme16x-rtc: BKL pushdownArnd Bergmann2008-07-02
| | | | | | | | | | | | Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* | | bvme6000-rtc: BKL pushdownArnd Bergmann2008-06-20
|/ / | | | | | | Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* | m68k: Add multi_defconfigGeert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | | | Add multi_defconfig, to build a kernel for all supported m68k platforms, excluding Sun 3 (Sun 3 kernels are incompatible with all other m68k platforms) Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Update defconfigsGeert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | Update the m68k defconfigs Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Correctly handle multi-ISA at runtimeGeert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | m68k: Correctly handle multi-ISA at runtime in multi-platform kernels Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Prefix ISA type with ISA_TYPE_Geert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | | | | | The *_ISA type defines are quite generic and cause namespace conflicts (e.g. with `AMIGAHW_DECLARE(GG2_ISA)' in <asm/amigahw.h>) for some kernel configurations. Use ISA_TYPE_* to avoid such conflicts. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: export m68k_mmutypeGeert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | | | | | | | | | UIO needs m68k_mmutype: ERROR: "m68k_mmutype" [drivers/uio/uio.ko] undefined! (noticed by Christian T. Steigies) Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Q40/Q60 floppy support is brokenGeert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | Mark Q40/Q60 floppy support broken: arch/m68k/q40/q40ints.c: In function 'q40_irq_handler': arch/m68k/q40/q40ints.c:214: error: implicit declaration of function 'floppy_hardint' Including <asm/floppy.h> doesn't help, as it causes a lot of additional error messages (cfr. Sun 3x). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Correct jump if not running on HP300Geert Uytterhoeven2008-05-18
| | | | | | | | | | | | | | | | When running a HP300-enabled kernel on non-HP300 hardware, a test in the early startup code jumps to the wrong label, causing a double bus fault. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Kill CONFIG_WHIPPET_SERIALGeert Uytterhoeven2008-05-18
|/ | | | | | | | The Hisoft Whippet PCMCIA serial driver has been removed a long time ago, but it's Kconfig symbol still existed. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: remove old mac_esp cruftFinn Thain2008-05-05
| | | | | | | | | Remove the rest of the old mac_esp driver. Also ditch the rest of the machw mechanism, it needs to be replaced by a fake openfirmware tree. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: Handle 68040 bus faultsRoman Zippel2008-05-05
| | | | | | | | | | | | Fix 68040 bus fault handling, so the standard kernel exception handling can be used for i/o probing. Contrary to normal access faults there is nothing to fix, but at least we have to disable writebacks to avoid recursive faults. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* unified (weak) sys_pipe implementationUlrich Drepper2008-05-03
| | | | | | | | | | | | | | | | | | | This replaces the duplicated arch-specific versions of "sys_pipe()" with one unified implementation. This removes almost 250 lines of duplicated code. It's marked __weak, so that *if* an architecture wants to override the default implementation it can do so by simply having its own replacement version, since many architectures use alternate calling conventions for the 'pipe()' system call for legacy reasons (ie traditional UNIX implementations often return the two file descriptors in registers) I still haven't changed the cris version even though Linus says the BKL isn't needed. The arch maintainer can easily do it if there are really no obstacles. Signed-off-by: Ulrich Drepper <drepper@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: Export empty_zero_page for ZERO_PAGE usage in modules.Aneesh Kumar K.V2008-04-29
| | | | | | | | | ext4 uses ZERO_PAGE(0) to zero out blocks. We need to export different symbols in different arches for the usage of ZERO_PAGE in modules. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* m68k/m68kmmu: use kbuild.h instead of defining macros in asm-offsets.cChristoph Lameter2008-04-29
| | | | | | | | | Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc: remove /proc/mac_iopAlexey Dobriyan2008-04-29
| | | | | | | | | | | | Entry creation was commented for a long time and right now it stands on the way of ->get_info removal, so unless nobody objects... Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Cc: Simon Arlott <simon@fire.lp0.eu> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Joern Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc: remove proc_root from driversAlexey Dobriyan2008-04-29
| | | | | | | | | | | | Remove proc_root export. Creation and removal works well if parent PDE is supplied as NULL -- it worked always that way. So, one useless export removed and consistency added, some drivers created PDEs with &proc_root as parent but removed them as NULL and so on. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-28
| | | | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: remove redundant display of free swap space in show_mem()Johannes Weiner2008-04-28
| | | | | | | | | | | | | | | show_mem() has no need to print the amount of free swap space manually because show_free_areas() does this already and is called by the former. The two outputs only differ in text formatting: printk("Free swap = %lukB\n", ...); printk("Free swap: %6ldkB\n", ...); Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch: Remove unnecessary inclusions of asm/semaphore.hMatthew Wilcox2008-04-18
| | | | | | | | | None of these files use any of the functionality promised by asm/semaphore.h. It's possible that they rely on it dragging in some unrelated header file, but I can't build all these files, so we'll have fix any build failures as they come up. Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
* Generic semaphore implementationMatthew Wilcox2008-04-17
| | | | | | | | | | | Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
* m68k: update defconfigs for 2.6.25Geert Uytterhoeven2008-04-04
| | | | | | | Long overdue update of the m68k defconfigs Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k: use KBUILD_DEFCONFIGAdrian Bunk2008-04-04
| | | | | | | | | | | | The default defconfig should be one from arch/m68k/configs/ arch/m68k/defconfig was not exactly identical to amiga_defconfig but also considering how long they have been without any update that doesn't seem to have been on purpose. Signed-off-by: Adrian Bunk <adrian.bunk@movial.fi> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m68k{,nommu}: Wire up new timerfd syscallsGeert Uytterhoeven2008-03-04
| | | | | | | | | m68k{,nommu}: Wire up the new timerfd syscalls, which were introduced in commit 4d672e7ac79b5ec5cdc90e450823441e20464691 ("timerfd: new timerfd API"). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ide: introduce HAVE_IDESam Ravnborg2008-02-09
| | | | | | | | | | | | 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 <sam@ravnborg.org> Acked-by: Russell King - ARM Linux <linux@arm.linux.org.uk> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* avoid overflows in kernel/time.cH. Peter Anvin2008-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the conversion factor between jiffies and milli- or microseconds is not a single multiply or divide, as for the case of HZ == 300, we currently do a multiply followed by a divide. The intervening result, however, is subject to overflows, especially since the fraction is not simplified (for HZ == 300, we multiply by 300 and divide by 1000). This is exposed to the user when passing a large timeout to poll(), for example. This patch replaces the multiply-divide with a reciprocal multiplication on 32-bit platforms. When the input is an unsigned long, there is no portable way to do this on 64-bit platforms there is no portable way to do this since it requires a 128-bit intermediate result (which gcc does support on 64-bit platforms but may generate libgcc calls, e.g. on 64-bit s390), but since the output is a 32-bit integer in the cases affected, just simplify the multiply-divide (*3/10 instead of *300/1000). The reciprocal multiply used can have off-by-one errors in the upper half of the valid output range. This could be avoided at the expense of having to deal with a potential 65-bit intermediate result. Since the intent is to avoid overflow problems and most of the other time conversions are only semiexact, the off-by-one errors were considered an acceptable tradeoff. At Ralf Baechle's suggestion, this version uses a Perl script to compute the necessary constants. We already have dependencies on Perl for kernel compiles. This does, however, require the Perl module Math::BigInt, which is included in the standard Perl distribution starting with version 5.8.0. In order to support older versions of Perl, include a table of canned constants in the script itself, and structure the script so that Math::BigInt isn't required if pulling values from said table. Running the script requires that the HZ value is available from the Makefile. Thus, this patch also adds the Kconfig variable CONFIG_HZ to the architectures which didn't already have it (alpha, cris, frv, h8300, m32r, m68k, m68knommu, sparc, v850, and xtensa.) It does *not* touch the sh or sh64 architectures, since Paul Mundt has dealt with those separately in the sh tree. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Ralf Baechle <ralf@linux-mips.org>, Cc: Sam Ravnborg <sam@ravnborg.org>, Cc: Paul Mundt <lethal@linux-sh.org>, Cc: Richard Henderson <rth@twiddle.net>, Cc: Michael Starvik <starvik@axis.com>, Cc: David Howells <dhowells@redhat.com>, Cc: Yoshinori Sato <ysato@users.sourceforge.jp>, Cc: Hirokazu Takata <takata@linux-m32r.org>, Cc: Geert Uytterhoeven <geert@linux-m68k.org>, Cc: Roman Zippel <zippel@linux-m68k.org>, Cc: William L. Irwin <sparclinux@vger.kernel.org>, Cc: Chris Zankel <chris@zankel.net>, Cc: H. Peter Anvin <hpa@zytor.com>, Cc: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* procfs: constify function pointer tablesJan Engelhardt2008-02-08
| | | | | | | | | | | | Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-By: David Howells <dhowells@redhat.com> Acked-by: Bryan Wu <bryan.wu@analog.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* aout: remove unnecessary inclusions of {asm, linux}/a.out.hDavid Howells2008-02-08
| | | | | | | | | | Remove now unnecessary inclusions of {asm,linux}/a.out.h. [akpm@linux-foundation.org: fix alpha build] Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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