Doug / smarc-fsl-linux-kernel

27 Jul, 2011

1 commit

  • 947be5dfd   gcov: disable CONSTRUCTORS for UML ... Browse Code »

    Selecting GCOV for UML causing configuration mismatch:

    warning: (GCOV_KERNEL) selects CONSTRUCTORS which has unmet direct dependencies (!UML)

    Constructors are not needed for UML.

    Signed-off-by: Vitaliy Ivanov
    Cc: Peter Oberparleiter
    Acked-by: Richard Weinberger
    Acked-by: WANG Cong
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vitaliy Ivanov
     

16 Jun, 2011

1 commit

  • d2c322587   gcov: disable CONFIG_CONSTRUCTORS when not needed by CONFIG_GCOV_KERNEL ... Browse Code »

    CONFIG_CONSTRUCTORS controls support for running constructor functions at
    kernel init time. According to commit b99b87f70c7785ab ("kernel:
    constructor support"), gcov (CONFIG_GCOV_KERNEL) needs this. However,
    CONFIG_CONSTRUCTORS currently defaults to y, with no option to disable it,
    and CONFIG_GCOV_KERNEL depends on it. Instead, default it to n and have
    CONFIG_GCOV_KERNEL select it, so that the normal case of
    CONFIG_GCOV_KERNEL=n will result in CONFIG_CONSTRUCTORS=n.

    Observed in the short list of =y values in a minimal kernel configuration.

    Signed-off-by: Josh Triplett
    Acked-by: WANG Cong
    Acked-by: Peter Oberparleiter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Josh Triplett
     

15 Feb, 2011

1 commit

  • d4f7e5132   sh: Enable CONFIG_GCOV_PROFILE_ALL for sh ... Browse Code »

    This patch enables gcov kernel profiling over the whole kernel for sh.
    Profiling of specific files individually already worked. A handful of
    files have to be explicitly excluded from the profiling to avoid
    breaking things, notably pmb.c.

    Signed-off-by: Chris Smith
    Signed-off-by: Stuart Menefy
    Signed-off-by: Paul Mundt

    Chris Smith
     

21 Sep, 2009

1 commit

20 Aug, 2009

1 commit

  • a15098c90   powerpc: Enable GCOV ... Browse Code »

    Make it possible to enable GCOV code coverage measurement on powerpc.

    Lightly tested on 64-bit, seems to work as expected.

    Signed-off-by: Michael Ellerman
    Signed-off-by: Benjamin Herrenschmidt

    Michael Ellerman
     

19 Jun, 2009

2 commits

  • 7bf99fb67   gcov: enable GCOV_PROFILE_ALL for x86_64 ... Browse Code »

    Enable gcov profiling of the entire kernel on x86_64. Required changes
    include disabling profiling for:

    * arch/kernel/acpi/realmode and arch/kernel/boot/compressed:
    not linked to main kernel
    * arch/vdso, arch/kernel/vsyscall_64 and arch/kernel/hpet:
    profiling causes segfaults during boot (incompatible context)

    Signed-off-by: Peter Oberparleiter
    Cc: Andi Kleen
    Cc: Huang Ying
    Cc: Li Wei
    Cc: Michael Ellerman
    Cc: Ingo Molnar
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Rusty Russell
    Cc: WANG Cong
    Cc: Sam Ravnborg
    Cc: Jeff Dike
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Oberparleiter
     
  • 2521f2c22   gcov: add gcov profiling infrastructure ... Browse Code »

    Enable the use of GCC's coverage testing tool gcov [1] with the Linux
    kernel. gcov may be useful for:

    * debugging (has this code been reached at all?)
    * test improvement (how do I change my test to cover these lines?)
    * minimizing kernel configurations (do I need this option if the
    associated code is never run?)

    The profiling patch incorporates the following changes:

    * change kbuild to include profiling flags
    * provide functions needed by profiling code
    * present profiling data as files in debugfs

    Note that on some architectures, enabling gcc's profiling option
    "-fprofile-arcs" for the entire kernel may trigger compile/link/
    run-time problems, some of which are caused by toolchain bugs and
    others which require adjustment of architecture code.

    For this reason profiling the entire kernel is initially restricted
    to those architectures for which it is known to work without changes.
    This restriction can be lifted once an architecture has been tested
    and found compatible with gcc's profiling. Profiling of single files
    or directories is still available on all platforms (see config help
    text).

    [1] http://gcc.gnu.org/onlinedocs/gcc/Gcov.html

    Signed-off-by: Peter Oberparleiter
    Cc: Andi Kleen
    Cc: Huang Ying
    Cc: Li Wei
    Cc: Michael Ellerman
    Cc: Ingo Molnar
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Rusty Russell
    Cc: WANG Cong
    Cc: Sam Ravnborg
    Cc: Jeff Dike
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Oberparleiter