linux-kernel - Re: [PATCH v2 2/3] powerpc: get hugetlbpage handling more generic

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Message-Id: <87mvj4xwt6.fsf@linux.vnet.ibm.com>
Date:   Mon, 19 Sep 2016 11:20:29 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Scott Wood <oss@...error.net>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 2/3] powerpc: get hugetlbpage handling more generic


Christophe Leroy <christophe.leroy@....fr> writes:
> +#else
> +static void hugepd_free(struct mmu_gather *tlb, void *hugepte)
> +{
> +	BUG();
> +}
> +
>  #endif


I was expecting that BUG will get removed in the next patch. But I don't
see it in the next patch. Considering

@@ -475,11 +453,10 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif
        for (i = 0; i < num_hugepd; i++, hpdp++)
                hpdp->pd = 0;

-#ifdef CONFIG_PPC_FSL_BOOK3E
-	hugepd_free(tlb, hugepte);
-#else
-	pgtable_free_tlb(tlb, hugepte, pdshift - shift);
-#endif
+	if (shift >= pdshift)
+		hugepd_free(tlb, hugepte);
+	else
+		pgtable_free_tlb(tlb, hugepte, pdshift - shift);
 }

What is that I am missing ?

-aneesh