Eric Lee / smarc-fsl-linux-kernel

05 Dec, 2018

1 commit

  • 0a9fe8ca8   x86/mm: Validate kernel_physical_mapping_init() PTE population ... Browse Code »

    The usage of __flush_tlb_all() in the kernel_physical_mapping_init()
    path is not necessary. In general flushing the TLB is not required when
    updating an entry from the !present state. However, to give confidence
    in the future removal of TLB flushing in this path, use the new
    set_pte_safe() family of helpers to assert that the !present assumption
    is true in this path.

    [ mingo: Minor readability edits. ]

    Suggested-by: Peter Zijlstra
    Suggested-by: Dave Hansen
    Signed-off-by: Dan Williams
    Acked-by: Kirill A. Shutemov
    Acked-by: Peter Zijlstra (Intel)
    Cc: Andy Lutomirski
    Cc: Borislav Petkov
    Cc: Dave Hansen
    Cc: H. Peter Anvin
    Cc: Linus Torvalds
    Cc: Rik van Riel
    Cc: Sebastian Andrzej Siewior
    Cc: Thomas Gleixner
    Link: http://lkml.kernel.org/r/154395944177.32119.8524957429632012270.stgit@dwillia2-desk3.amr.corp.intel.com
    Signed-off-by: Ingo Molnar

    Dan Williams
     

02 Nov, 2018

1 commit

14 Feb, 2018

1 commit

  • c65e774fb   x86/mm: Make PGDIR_SHIFT and PTRS_PER_P4D variable ... Browse Code »

    For boot-time switching between 4- and 5-level paging we need to be able
    to fold p4d page table level at runtime. It requires variable
    PGDIR_SHIFT and PTRS_PER_P4D.

    The change doesn't affect the kernel image size much:

    text data bss dec hex filename
    8628091 4734304 1368064 14730459 e0c4db vmlinux.before
    8628393 4734340 1368064 14730797 e0c62d vmlinux.after

    Signed-off-by: Kirill A. Shutemov
    Cc: Andy Lutomirski
    Cc: Borislav Petkov
    Cc: Linus Torvalds
    Cc: Peter Zijlstra
    Cc: Thomas Gleixner
    Cc: linux-mm@kvack.org
    Link: http://lkml.kernel.org/r/20180214111656.88514-7-kirill.shutemov@linux.intel.com
    Signed-off-by: Ingo Molnar

    Kirill A. Shutemov
     

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

10 Mar, 2017

1 commit