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    Subject[PATCH v12 31/69] arm64: Change elfcore for_each_mte_vma() to use VMA iterator
    Date
    From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

    Rework for_each_mte_vma() to use a VMA iterator instead of an explicit
    linked-list.

    Link: https://lkml.kernel.org/r/20220504011345.662299-16-Liam.Howlett@oracle.com
    Link: https://lkml.kernel.org/r/20220621204632.3370049-32-Liam.Howlett@oracle.com
    Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
    Acked-by: Catalin Marinas <catalin.marinas@arm.com>
    Link: https://lore.kernel.org/r/20220218023650.672072-1-Liam.Howlett@oracle.com
    Signed-off-by: Will Deacon <will@kernel.org>
    Cc: David Howells <dhowells@redhat.com>
    Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
    Cc: SeongJae Park <sj@kernel.org>
    Cc: Vlastimil Babka <vbabka@suse.cz>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    ---
    arch/arm64/kernel/elfcore.c | 16 ++++++++++------
    1 file changed, 10 insertions(+), 6 deletions(-)

    diff --git a/arch/arm64/kernel/elfcore.c b/arch/arm64/kernel/elfcore.c
    index 98d67444a5b6..27ef7ad3ffd2 100644
    --- a/arch/arm64/kernel/elfcore.c
    +++ b/arch/arm64/kernel/elfcore.c
    @@ -8,9 +8,9 @@
    #include <asm/cpufeature.h>
    #include <asm/mte.h>

    -#define for_each_mte_vma(tsk, vma) \
    +#define for_each_mte_vma(vmi, vma) \
    if (system_supports_mte()) \
    - for (vma = tsk->mm->mmap; vma; vma = vma->vm_next) \
    + for_each_vma(vmi, vma) \
    if (vma->vm_flags & VM_MTE)

    static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
    @@ -81,8 +81,9 @@ Elf_Half elf_core_extra_phdrs(void)
    {
    struct vm_area_struct *vma;
    int vma_count = 0;
    + VMA_ITERATOR(vmi, current->mm, 0);

    - for_each_mte_vma(current, vma)
    + for_each_mte_vma(vmi, vma)
    vma_count++;

    return vma_count;
    @@ -91,8 +92,9 @@ Elf_Half elf_core_extra_phdrs(void)
    int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
    {
    struct vm_area_struct *vma;
    + VMA_ITERATOR(vmi, current->mm, 0);

    - for_each_mte_vma(current, vma) {
    + for_each_mte_vma(vmi, vma) {
    struct elf_phdr phdr;

    phdr.p_type = PT_AARCH64_MEMTAG_MTE;
    @@ -116,8 +118,9 @@ size_t elf_core_extra_data_size(void)
    {
    struct vm_area_struct *vma;
    size_t data_size = 0;
    + VMA_ITERATOR(vmi, current->mm, 0);

    - for_each_mte_vma(current, vma)
    + for_each_mte_vma(vmi, vma)
    data_size += mte_vma_tag_dump_size(vma);

    return data_size;
    @@ -126,8 +129,9 @@ size_t elf_core_extra_data_size(void)
    int elf_core_write_extra_data(struct coredump_params *cprm)
    {
    struct vm_area_struct *vma;
    + VMA_ITERATOR(vmi, current->mm, 0);

    - for_each_mte_vma(current, vma) {
    + for_each_mte_vma(vmi, vma) {
    if (vma->vm_flags & VM_DONTDUMP)
    continue;

    --
    2.35.1
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