• Hugh Dickins's avatar
    [PATCH] mm: arches skip ptlock · b462705a
    Hugh Dickins authored
    Convert those few architectures which are calling pud_alloc, pmd_alloc,
    pte_alloc_map on a user mm, not to take the page_table_lock first, nor drop it
    after.  Each of these can continue to use pte_alloc_map, no need to change
    over to pte_alloc_map_lock, they're neither racy nor swappable.
    
    In the sparc64 io_remap_pfn_range, flush_tlb_range then falls outside of the
    page_table_lock: that's okay, on sparc64 it's like flush_tlb_mm, and that has
    always been called from outside of page_table_lock in dup_mmap.
    Signed-off-by: default avatarHugh Dickins <hugh@veritas.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    b462705a
generic.c 4.03 KB