Eric Lee / smarc-fsl-linux-kernel

31 May, 2019

1 commit

  • 2874c5fd2   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 ... Browse Code »

    Based on 1 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license as published by
    the free software foundation either version 2 of the license or at
    your option any later version

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-or-later

    has been chosen to replace the boilerplate/reference in 3029 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Allison Randal
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

16 May, 2018

1 commit

25 Dec, 2016

1 commit

24 Jun, 2015

1 commit

24 Jan, 2014

1 commit

  • abaf3787a   fs/proc: don't use module_init for non-modular core code ... Browse Code »

    PROC_FS is a bool, so this code is either present or absent. It will
    never be modular, so using module_init as an alias for __initcall is
    rather misleading.

    Fix this up now, so that we can relocate module_init from init.h into
    module.h in the future. If we don't do this, we'd have to add module.h to
    obviously non-modular code, and that would be ugly at best.

    Note that direct use of __initcall is discouraged, vs. one of the
    priority categorized subgroups. As __initcall gets mapped onto
    device_initcall, our use of fs_initcall (which makes sense for fs code)
    will thus change these registrations from level 6-device to level 5-fs
    (i.e. slightly earlier). However no observable impact of that small
    difference has been observed during testing, or is expected.

    Also note that this change uncovers a missing semicolon bug in the
    registration of vmcore_init as an initcall.

    Signed-off-by: Paul Gortmaker
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Paul Gortmaker
     

15 Nov, 2013

1 commit

23 Feb, 2013

1 commit

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

23 Sep, 2009

1 commit

  • 88e9d34c7   seq_file: constify seq_operations ... Browse Code »

    Make all seq_operations structs const, to help mitigate against
    revectoring user-triggerable function pointers.

    This is derived from the grsecurity patch, although generated from scratch
    because it's simpler than extracting the changes from there.

    Signed-off-by: James Morris
    Acked-by: Serge Hallyn
    Acked-by: Casey Schaufler
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    James Morris
     

30 Mar, 2009

1 commit

08 Jan, 2009

1 commit

  • 8feae1311   NOMMU: Make VMAs per MM as for MMU-mode linux ... Browse Code »

    Make VMAs per mm_struct as for MMU-mode linux. This solves two problems:

    (1) In SYSV SHM where nattch for a segment does not reflect the number of
    shmat's (and forks) done.

    (2) In mmap() where the VMA's vm_mm is set to point to the parent mm by an
    exec'ing process when VM_EXECUTABLE is specified, regardless of the fact
    that a VMA might be shared and already have its vm_mm assigned to another
    process or a dead process.

    A new struct (vm_region) is introduced to track a mapped region and to remember
    the circumstances under which it may be shared and the vm_list_struct structure
    is discarded as it's no longer required.

    This patch makes the following additional changes:

    (1) Regions are now allocated with alloc_pages() rather than kmalloc() and
    with no recourse to __GFP_COMP, so the pages are not composite. Instead,
    each page has a reference on it held by the region. Anything else that is
    interested in such a page will have to get a reference on it to retain it.
    When the pages are released due to unmapping, each page is passed to
    put_page() and will be freed when the page usage count reaches zero.

    (2) Excess pages are trimmed after an allocation as the allocation must be
    made as a power-of-2 quantity of pages.

    (3) VMAs are added to the parent MM's R/B tree and mmap lists. As an MM may
    end up with overlapping VMAs within the tree, the VMA struct address is
    appended to the sort key.

    (4) Non-anonymous VMAs are now added to the backing inode's prio list.

    (5) Holes may be punched in anonymous VMAs with munmap(), releasing parts of
    the backing region. The VMA and region structs will be split if
    necessary.

    (6) sys_shmdt() only releases one attachment to a SYSV IPC shared memory
    segment instead of all the attachments at that addresss. Multiple
    shmat()'s return the same address under NOMMU-mode instead of different
    virtual addresses as under MMU-mode.

    (7) Core dumping for ELF-FDPIC requires fewer exceptions for NOMMU-mode.

    (8) /proc/maps is now the global list of mapped regions, and may list bits
    that aren't actually mapped anywhere.

    (9) /proc/meminfo gains a line (tagged "MmapCopy") that indicates the amount
    of RAM currently allocated by mmap to hold mappable regions that can't be
    mapped directly. These are copies of the backing device or file if not
    anonymous.

    These changes make NOMMU mode more similar to MMU mode. The downside is that
    NOMMU mode requires some extra memory to track things over NOMMU without this
    patch (VMAs are no longer shared, and there are now region structs).

    Signed-off-by: David Howells
    Tested-by: Mike Frysinger
    Acked-by: Paul Mundt

    David Howells
     

21 Aug, 2008

1 commit

  • 1804dc6e1   /proc/self/maps doesn't display the real file offset ... Browse Code »

    This addresses

    http://bugzilla.kernel.org/show_bug.cgi?id=11318

    In function show_map (file: fs/proc/task_mmu.c), if vma->vm_pgoff > 2^20
    than (vma->vm_pgoff << PAGE_SIZE) is greater than 2^32 (with PAGE_SIZE
    equal to 4096 (i.e. 2^12). The next seq_printf use an unsigned long for
    the conversion of (vma->vm_pgoff << PAGE_SIZE), as a result the offset
    value displayed in /proc/self/maps is truncated if the page offset is
    greater than 2^20.

    A test that shows this issue:

    #define _GNU_SOURCE
    #include
    #include
    #include
    #include
    #include
    #include
    #include
    #include

    #define PAGE_SIZE (getpagesize())

    #if __i386__
    # define U64_STR "%llx"
    #elif __x86_64
    # define U64_STR "%lx"
    #else
    # error "Architecture Unsupported"
    #endif

    int main(int argc, char *argv[])
    {
    int fd;
    char *addr;
    off64_t offset = 0x10000000;
    char *filename = "/dev/zero";

    fd = open(filename, O_RDONLY);
    if (fd < 0) {
    perror("open");
    return 1;
    }

    offset *= 0x10;
    printf("offset = " U64_STR "\n", offset);

    addr = (char*)mmap64(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE, fd,
    offset);
    if ((void*)addr == MAP_FAILED) {
    perror("mmap64");
    return 1;
    }

    {
    FILE *fmaps;
    char *line = NULL;
    size_t len = 0;
    ssize_t read;
    size_t filename_len = strlen(filename);

    fmaps = fopen("/proc/self/maps", "r");
    if (!fmaps) {
    perror("fopen");
    return 1;
    }
    while ((read = getline(&line, &len, fmaps)) != -1) {
    if ((read > filename_len + 1)
    && (strncmp(&line[read - filename_len - 1], filename, filename_len) == 0))
    printf("%s", line);
    }

    if (line)
    free(line);

    fclose(fmaps);
    }

    close(fd);
    return 0;
    }

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: Clement Calmels
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Clement Calmels
     

29 Apr, 2008

1 commit

15 Feb, 2008

1 commit

  • c32c2f63a   d_path: Make seq_path() use a struct path argument ... Browse Code »

    seq_path() is always called with a dentry and a vfsmount from a struct path.
    Make seq_path() take it directly as an argument.

    Signed-off-by: Jan Blunck
    Cc: Christoph Hellwig
    Cc: Al Viro
    Cc: "J. Bruce Fields"
    Cc: Neil Brown
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jan Blunck
     

09 Feb, 2008

1 commit

13 Feb, 2007

1 commit

  • 00977a59b   [PATCH] mark struct file_operations const 6 ... Browse Code »

    Many struct file_operations in the kernel can be "const". Marking them const
    moves these to the .rodata section, which avoids false sharing with potential
    dirty data. In addition it'll catch accidental writes at compile time to
    these shared resources.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

09 Dec, 2006

1 commit

27 Sep, 2006

1 commit

18 Oct, 2005

1 commit

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