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Subject[PATCH 0/3] eldie generated code for folded p4d/pud
Date
Hi,

This series elides extraneous generate code for folded p4d/pud.
This came up when trying to remove __ARCH_USE_5LEVEL_HACK from ARC port.
The code saving are not a while lot, but still worthwhile IMHO.

bloat-o-meter2 vmlinux-A-baseline vmlinux-E-elide-p?d_clear_bad
add/remove: 0/2 grow/shrink: 0/1 up/down: 0/-146 (-146)
function old new delta
p4d_clear_bad 2 - -2
pud_clear_bad 20 - -20
free_pgd_range 546 422 -124
Total: Before=4137148, After=4137002, chg -1.000000%

Thx,
-Vineet

Vineet Gupta (3):
asm-generic/tlb: stub out pud_free_tlb() if __PAGETABLE_PUD_FOLDED ...
asm-generic/tlb: stub out p4d_free_tlb() if __PAGETABLE_P4D_FOLDED ...
asm-generic/mm: stub out p{4,d}d_clear_bad() if
__PAGETABLE_P{4,u}D_FOLDED

include/asm-generic/4level-fixup.h | 2 --
include/asm-generic/5level-fixup.h | 2 --
include/asm-generic/pgtable.h | 11 +++++++++++
include/asm-generic/tlb.h | 8 ++++++--
mm/pgtable-generic.c | 4 ++++
5 files changed, 21 insertions(+), 6 deletions(-)

--
2.20.1

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