linux-kernel - [PATCH v2 07/17] powerpc/mm: make hugetlbpage.c depend on CONFIG_HUGETLB

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Message-Id: <192a738d386a605095e1fee1d45b63917abbdf1e.1556258135.git.christophe.leroy@c-s.fr>
Date:   Fri, 26 Apr 2019 05:59:42 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        aneesh.kumar@...ux.ibm.com
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 07/17] powerpc/mm: make hugetlbpage.c depend on
 CONFIG_HUGETLB_PAGE

The only function in hugetlbpage.c which doesn't depend on
CONFIG_HUGETLB_PAGE is gup_hugepte(), and this function is
only called from gup_huge_pd() which depends on
CONFIG_HUGETLB_PAGE so all the content of hugetlbpage.c
depends on CONFIG_HUGETLB_PAGE.

This patch modifies Makefile to only compile hugetlbpage.c
when CONFIG_HUGETLB_PAGE is set.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/mm/Makefile      | 2 +-
 arch/powerpc/mm/hugetlbpage.c | 5 -----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 2c23d1ece034..20b900537fc9 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -33,7 +33,7 @@ obj-$(CONFIG_PPC_FSL_BOOK3E)	+= fsl_booke_mmu.o
 obj-$(CONFIG_NEED_MULTIPLE_NODES) += numa.o
 obj-$(CONFIG_PPC_SPLPAR)	+= vphn.o
 obj-$(CONFIG_PPC_MM_SLICES)	+= slice.o
-obj-y				+= hugetlbpage.o
+obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
 ifdef CONFIG_HUGETLB_PAGE
 obj-$(CONFIG_PPC_BOOK3S_64)	+= hugetlbpage-hash64.o
 obj-$(CONFIG_PPC_RADIX_MMU)	+= hugetlbpage-radix.o
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 81daa0e38665..809f8f167962 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -26,9 +26,6 @@
 #include <asm/hugetlb.h>
 #include <asm/pte-walk.h>
 
-
-#ifdef CONFIG_HUGETLB_PAGE
-
 #define PAGE_SHIFT_64K	16
 #define PAGE_SHIFT_512K	19
 #define PAGE_SHIFT_8M	23
@@ -756,8 +753,6 @@ void flush_dcache_icache_hugepage(struct page *page)
 	}
 }
 
-#endif /* CONFIG_HUGETLB_PAGE */
-
 int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
 		unsigned long end, int write, struct page **pages, int *nr)
 {
-- 
2.13.3