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    Subject[PATCH v14 005/138] mm/debug: Add VM_BUG_ON_FOLIO() and VM_WARN_ON_ONCE_FOLIO()
    Date
    These are the folio equivalents of VM_BUG_ON_PAGE and
    VM_WARN_ON_ONCE_PAGE. No change to generated code.

    Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
    Reviewed-by: Zi Yan <ziy@nvidia.com>
    Reviewed-by: Christoph Hellwig <hch@lst.de>
    Acked-by: Jeff Layton <jlayton@kernel.org>
    Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Acked-by: Vlastimil Babka <vbabka@suse.cz>
    Reviewed-by: William Kucharski <william.kucharski@oracle.com>
    Reviewed-by: David Howells <dhowells@redhat.com>
    ---
    include/linux/mmdebug.h | 20 ++++++++++++++++++++
    1 file changed, 20 insertions(+)

    diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
    index 1935d4c72d10..d7285f8148a3 100644
    --- a/include/linux/mmdebug.h
    +++ b/include/linux/mmdebug.h
    @@ -22,6 +22,13 @@ void dump_mm(const struct mm_struct *mm);
    BUG(); \
    } \
    } while (0)
    +#define VM_BUG_ON_FOLIO(cond, folio) \
    + do { \
    + if (unlikely(cond)) { \
    + dump_page(&folio->page, "VM_BUG_ON_FOLIO(" __stringify(cond)")");\
    + BUG(); \
    + } \
    + } while (0)
    #define VM_BUG_ON_VMA(cond, vma) \
    do { \
    if (unlikely(cond)) { \
    @@ -47,6 +54,17 @@ void dump_mm(const struct mm_struct *mm);
    } \
    unlikely(__ret_warn_once); \
    })
    +#define VM_WARN_ON_ONCE_FOLIO(cond, folio) ({ \
    + static bool __section(".data.once") __warned; \
    + int __ret_warn_once = !!(cond); \
    + \
    + if (unlikely(__ret_warn_once && !__warned)) { \
    + dump_page(&folio->page, "VM_WARN_ON_ONCE_FOLIO(" __stringify(cond)")");\
    + __warned = true; \
    + WARN_ON(1); \
    + } \
    + unlikely(__ret_warn_once); \
    +})

    #define VM_WARN_ON(cond) (void)WARN_ON(cond)
    #define VM_WARN_ON_ONCE(cond) (void)WARN_ON_ONCE(cond)
    @@ -55,11 +73,13 @@ void dump_mm(const struct mm_struct *mm);
    #else
    #define VM_BUG_ON(cond) BUILD_BUG_ON_INVALID(cond)
    #define VM_BUG_ON_PAGE(cond, page) VM_BUG_ON(cond)
    +#define VM_BUG_ON_FOLIO(cond, folio) VM_BUG_ON(cond)
    #define VM_BUG_ON_VMA(cond, vma) VM_BUG_ON(cond)
    #define VM_BUG_ON_MM(cond, mm) VM_BUG_ON(cond)
    #define VM_WARN_ON(cond) BUILD_BUG_ON_INVALID(cond)
    #define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
    #define VM_WARN_ON_ONCE_PAGE(cond, page) BUILD_BUG_ON_INVALID(cond)
    +#define VM_WARN_ON_ONCE_FOLIO(cond, folio) BUILD_BUG_ON_INVALID(cond)
    #define VM_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)
    #define VM_WARN(cond, format...) BUILD_BUG_ON_INVALID(cond)
    #endif
    --
    2.30.2
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