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bffd972347
... independent of __ARCH_HAS_5LEVEL_HACK This came up when removing __ARCH_HAS_5LEVEL_HACK for ARC as code bloat. With this patch we see the following code reduction | bloat-o-meter2 vmlinux-C-elide-pud_free_tlb vmlinux-D-elide-p4d_free_tlb | add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-104 (-104) | function old new delta | free_pgd_range 552 422 -130 | Total: Before=4137172, After=4137042, chg -1.000000% Link: http://lkml.kernel.org/r/20191016162400.14796-4-vgupta@synopsys.com Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Nick Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _5LEVEL_FIXUP_H
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#define _5LEVEL_FIXUP_H
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#define __ARCH_HAS_5LEVEL_HACK
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#define __PAGETABLE_P4D_FOLDED 1
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#define P4D_SHIFT PGDIR_SHIFT
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#define P4D_SIZE PGDIR_SIZE
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#define P4D_MASK PGDIR_MASK
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#define MAX_PTRS_PER_P4D 1
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#define PTRS_PER_P4D 1
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#define p4d_t pgd_t
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#define pud_alloc(mm, p4d, address) \
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((unlikely(pgd_none(*(p4d))) && __pud_alloc(mm, p4d, address)) ? \
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NULL : pud_offset(p4d, address))
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#define p4d_alloc(mm, pgd, address) (pgd)
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#define p4d_offset(pgd, start) (pgd)
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#ifndef __ASSEMBLY__
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static inline int p4d_none(p4d_t p4d)
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{
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return 0;
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}
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static inline int p4d_bad(p4d_t p4d)
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{
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return 0;
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}
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static inline int p4d_present(p4d_t p4d)
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{
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return 1;
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}
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#endif
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#define p4d_ERROR(p4d) do { } while (0)
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#define p4d_clear(p4d) pgd_clear(p4d)
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#define p4d_val(p4d) pgd_val(p4d)
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#define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud)
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#define p4d_populate_safe(mm, p4d, pud) pgd_populate(mm, p4d, pud)
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#define p4d_page(p4d) pgd_page(p4d)
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#define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d)
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#define __p4d(x) __pgd(x)
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#define set_p4d(p4dp, p4d) set_pgd(p4dp, p4d)
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#undef p4d_free_tlb
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#define p4d_free_tlb(tlb, x, addr) do { } while (0)
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#define p4d_free(mm, x) do { } while (0)
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#undef p4d_addr_end
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#define p4d_addr_end(addr, end) (end)
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#endif
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