Eric Lee / smarc-fsl-linux-kernel

09 Sep, 2016

1 commit

  • b67067f11   kbuild: allow archs to select link dead code/data elimination ... Browse Code »

    Introduce LD_DEAD_CODE_DATA_ELIMINATION option for architectures to
    select to build with -ffunction-sections, -fdata-sections, and link
    with --gc-sections. It requires some work (documented) to ensure all
    unreferenced entrypoints are live, and requires toolchain and build
    verification, so it is made a per-arch option for now.

    On a random powerpc64le build, this yelds a significant size saving,
    it boots and runs fine, but there is a lot I haven't tested as yet, so
    these savings may be reduced if there are bugs in the link.

    text data bss dec filename
    11169741 1180744 1923176 14273661 vmlinux
    10445269 1004127 1919707 13369103 vmlinux.dce

    ~700K text, ~170K data, 6% removed from kernel image size.

    Signed-off-by: Nicholas Piggin
    Signed-off-by: Michal Marek

    Nicholas Piggin
     

05 May, 2012

2 commits

  • a6359d1ee   init_task: Replace CONFIG_HAVE_GENERIC_INIT_TASK ... Browse Code »

    Now that all archs except ia64 are converted, replace the config and
    let the ia64 select CONFIG_ARCH_INIT_TASK

    Signed-off-by: Thomas Gleixner
    Link: http://lkml.kernel.org/r/20120503085035.867948914@linutronix.de

    Thomas Gleixner
     
  • a4a2eb490   init_task: Create generic init_task instance ... Browse Code »

    All archs define init_task in the same way (except ia64, but there is
    no particular reason why ia64 cannot use the common version). Create a
    generic instance so all archs can be converted over.

    The config switch is temporary and will be removed when all archs are
    converted over.

    Signed-off-by: Thomas Gleixner
    Cc: Benjamin Herrenschmidt
    Cc: Chen Liqin
    Cc: Chris Metcalf
    Cc: Chris Zankel
    Cc: David Howells
    Cc: David S. Miller
    Cc: Geert Uytterhoeven
    Cc: Guan Xuetao
    Cc: Haavard Skinnemoen
    Cc: Hirokazu Takata
    Cc: James E.J. Bottomley
    Cc: Jesper Nilsson
    Cc: Jonas Bonn
    Cc: Mark Salter
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Matt Turner
    Cc: Michal Simek
    Cc: Mike Frysinger
    Cc: Paul Mundt
    Cc: Ralf Baechle
    Cc: Richard Kuo
    Cc: Richard Weinberger
    Cc: Russell King
    Cc: Yoshinori Sato
    Link: http://lkml.kernel.org/r/20120503085034.092585287@linutronix.de

    Thomas Gleixner
     

12 Dec, 2009

1 commit

12 Feb, 2008

1 commit

  • fab1e310d   kbuild: fix make V=1 ... Browse Code »

    When make -s support were added to filechk to
    combination created with make V=1 were not
    covered.
    Fix it by explicitly cover this case too.

    Signed-off-by: Sam Ravnborg
    Cc: Mike Frysinger

    Sam Ravnborg
     

09 Feb, 2008

1 commit

15 Oct, 2007

1 commit

  • a0f97e06a   kbuild: enable 'make CFLAGS=...' to add additional options to CC ... Browse Code »

    The variable CFLAGS is a wellknown variable and the usage by
    kbuild may result in unexpected behaviour.
    On top of that several people over time has asked for a way to
    pass in additional flags to gcc.

    This patch replace use of CFLAGS with KBUILD_CFLAGS all over the
    tree and enabling one to use:
    make CFLAGS=...
    to specify additional gcc commandline options.

    One usecase is when trying to find gcc bugs but other
    use cases has been requested too.

    Patch was tested on following architectures:
    alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k

    Test was simple to do a defconfig build, apply the patch and check
    that nothing got rebuild.

    Signed-off-by: Sam Ravnborg

    Sam Ravnborg
     

12 Feb, 2007

1 commit

  • c33df4eaa   [PATCH] disable init/initramfs.c ... Browse Code »

    The file init/initramfs.c is always compiled and linked in the kernel
    vmlinux even when BLK_DEV_RAM and BLK_DEV_INITRD are disabled and the
    system isn't using any form of an initramfs or initrd. In this situation
    the code is only used to unpack a (static) default initial rootfilesystem.
    The current init/initramfs.c code. usr/initramfs_data.o compiles to a size
    of ~15 kbytes. Disabling BLK_DEV_RAM and BLK_DEV_INTRD shrinks the kernel
    code size with ~60 Kbytes.

    This patch avoids compiling in the code and data for initramfs support if
    CONFIG_BLK_DEV_INITRD is not defined. Instead of the initramfs code and
    data it uses a small routine in init/noinitramfs.c to setup an initial
    static default environment for mounting a rootfilesystem later on in the
    kernel initialisation process. The new code is: 164 bytes of size.

    The patch is separated in two parts:
    1) doesn't compile initramfs code when CONFIG_BLK_DEV_INITRD is not set
    2) changing all plaforms vmlinux.lds.S files to not reserve an area of
    PAGE_SIZE when CONFIG_BLK_DEV_INITRD is not set.

    [deweerdt@free.fr: warning fix]
    Signed-off-by: Jean-Paul Saman
    Cc: Al Viro
    Cc:
    Signed-off-by: Frederik Deweerdt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jean-Paul Saman
     

11 Jan, 2007

1 commit

  • 3eb3c740f   [PATCH] fix linux banner format string ... Browse Code »

    Revert previous attempts at messing with the linux banner string and
    simply use a separate format string for proc.

    Signed-off-by: Roman Zippel
    Acked-by: Olaf Hering
    Acked-by: Jean Delvare
    Cc: Andrey Borzenkov
    Cc: Andrew Morton
    Cc: Andy Whitcroft
    Cc: Herbert Poetzl
    Signed-off-by: Linus Torvalds

    Roman Zippel
     

23 Dec, 2006

1 commit

  • ef129412b   [PATCH] build compile.h earlier ... Browse Code »

    compile.h is created super-late in the build. But proc_misc.c want to include
    it, and it's generally not sane to have a header file in include/linux be
    created at the end of the build: it's either not present or, worse, wrong for
    most of the build.

    So the patch arranges for compile.h to be built at the start of the build
    process. It also consolidates the compile.h rules with those for version.h
    and utsname.h, so they all get built together.

    I hope. My chances of having got this right are about 2%.

    Cc: Sam Ravnborg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

09 Dec, 2006

1 commit

  • a2ee8649b   [PATCH] Fix linux banner utsname information ... Browse Code »

    utsname information is shown in the linux banner, which also is used for
    /proc/version (which can have different utsname values inside a uts
    namespaces). this patch makes the varying data arguments and changes the
    string to a format string, using those arguments.

    Signed-off-by: Herbert Poetzl
    Cc: "Eric W. Biederman"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Herbert Poetzl
     

27 Jun, 2006

1 commit

15 Jul, 2005

1 commit

  • bd5bdd875   kbuild: "PREEMPT" in UTS_VERSION ... Browse Code »

    From: Matt Mackall

    Add PREEMPT to UTS_VERSION where enabled as is done for SMP to make
    preempt kernels easily identifiable.
    Added SMP PREEMPT as comment in compile.h to force it to be
    updated when they change (sam).

    Signed-off-by: Matt Mackall
    Signed-off-by: Sam Ravnborg

    Sam Ravnborg
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds