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authorDan Williams <dan.j.williams@intel.com>2017-11-29 16:10:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-29 18:40:42 -0800
commite4e40e0263ea6a3bfefbfd15d1b6ff5c03f2b95e (patch)
treeb70c06130d7d4a3e777d8f0e9e70173354589b2d /include/asm-generic
parent1501899a898dfb5477c55534bdfd734c046da06d (diff)
mm: switch to 'define pmd_write' instead of __HAVE_ARCH_PMD_WRITE
In response to compile breakage introduced by a series that added the pud_write helper to x86, Stephen notes: did you consider using the other paradigm: In arch include files: #define pud_write pud_write static inline int pud_write(pud_t pud) ..... Then in include/asm-generic/pgtable.h: #ifndef pud_write tatic inline int pud_write(pud_t pud) { .... } #endif If you had, then the powerpc code would have worked ... ;-) and many of the other interfaces in include/asm-generic/pgtable.h are protected that way ... Given that some architecture already define pmd_write() as a macro, it's a net reduction to drop the definition of __HAVE_ARCH_PMD_WRITE. Link: http://lkml.kernel.org/r/151129126721.37405.13339850900081557813.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com> Suggested-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Oliver OHalloran <oliveroh@au1.ibm.com> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/pgtable.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 1ac457511f4e..b234d54f2cb6 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -805,13 +805,13 @@ static inline int pmd_trans_huge(pmd_t pmd)
{
return 0;
}
-#ifndef __HAVE_ARCH_PMD_WRITE
+#ifndef pmd_write
static inline int pmd_write(pmd_t pmd)
{
BUG();
return 0;
}
-#endif /* __HAVE_ARCH_PMD_WRITE */
+#endif /* pmd_write */
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#ifndef pud_write