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From:   Vineet Gupta <Vineet.Gupta1@synopsys.com>
To:     Arnd Bergmann <arnd@arndb.de>, Will Deacon <will@kernel.org>,
        "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Nick Piggin <npiggin@gmail.com>,
        Peter Zijlstra <peterz@infradead.org>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     linux-mm@kvack.org, linux-snps-arc@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
        Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH v2 4/5] asm-generic/tlb: stub out pmd_free_tlb() if nopmd
Date:   Tue, 15 Oct 2019 12:19:25 -0700
Message-Id: <20191015191926.9281-5-vgupta@synopsys.com>
In-Reply-To: <20191015191926.9281-1-vgupta@synopsys.com>
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Note that pmd routine folding can be tricky as even in 2-level setup
(where pmd is folded) most pmd routines refer to upper levels.
This one can surely be elided however.

| bloat-o-meter2 vmlinux-E-elide-p?d_clear_bad vmlinux-F-elide-pmd_free_tlb
| add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-112 (-112)
| function                                     old     new   delta
| free_pgd_range                               422     310    -112
| Total: Before=4137042, After=4136930, chg -1.000000%

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 include/asm-generic/pgtable-nopmd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h
index b85b8271a73d..0d9b28cba16d 100644
--- a/include/asm-generic/pgtable-nopmd.h
+++ b/include/asm-generic/pgtable-nopmd.h
@@ -60,7 +60,7 @@ static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 {
 }
-#define __pmd_free_tlb(tlb, x, a)		do { } while (0)
+#define pmd_free_tlb(tlb, x, a)		do { } while (0)
 
 #undef  pmd_addr_end
 #define pmd_addr_end(addr, end)			(end)
-- 
2.20.1