Re: [PATCH v3 02/11] hugetlb: Introduce generic version of hugetlb_free_pgd_range

Christophe Leroy <christophe.leroy@xxxxxx> · Thu, 5 Jul 2018 10:22:30 +0000

On 07/05/2018 05:16 AM, Alexandre Ghiti wrote:

arm, arm64, mips, parisc, sh, x86 architectures use the
same version of hugetlb_free_pgd_range, so move this generic
implementation into asm-generic/hugetlb.h.

Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx>


Build failure on mpc885_ads_defconfig

  CC      arch/powerpc/kernel/setup-common.o
In file included from arch/powerpc/kernel/setup-common.c:37:

./include/linux/hugetlb.h:191:65: error: expected identifier or '(' 

before '{' token

 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) 

({BUG(); 0; })

                                                                 ^

./include/asm-generic/hugetlb.h:44:20: note: in expansion of macro 

'hugetlb_free_pgd_range'

 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
                    ^~~~~~~~~~~~~~~~~~~~~~

see below


---
  arch/arm/include/asm/hugetlb.h     | 12 ++----------
  arch/arm64/include/asm/hugetlb.h   | 10 ----------
  arch/ia64/include/asm/hugetlb.h    |  5 +++--
  arch/mips/include/asm/hugetlb.h    | 13 ++-----------
  arch/parisc/include/asm/hugetlb.h  | 12 ++----------
  arch/powerpc/include/asm/hugetlb.h |  4 +++-
  arch/sh/include/asm/hugetlb.h      | 12 ++----------
  arch/sparc/include/asm/hugetlb.h   |  4 +++-
  arch/x86/include/asm/hugetlb.h     | 11 ++---------
  include/asm-generic/hugetlb.h      | 11 +++++++++++
  10 files changed, 30 insertions(+), 64 deletions(-)



[snip]

diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
index 3225eb6402cc..de46ee16b615 100644
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -4,7 +4,6 @@

  

  #ifdef CONFIG_HUGETLB_PAGE

  #include <asm/page.h>
-#include <asm-generic/hugetlb.h>

  

  extern struct kmem_cache *hugepte_cache;

  

@@ -113,6 +112,7 @@ static inline void flush_hugetlb_page(struct vm_area_struct *vma,

  void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  #endif

  

+#define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE

  void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  			    unsigned long end, unsigned long floor,
  			    unsigned long ceiling);
@@ -193,4 +193,6 @@ static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
  }
  #endif /* CONFIG_HUGETLB_PAGE */

  

+#include <asm-generic/hugetlb.h>

+


That include was previously inside #ifdef CONFIG_HUGETLB_PAGE.
Why put it outside ?

Christophe

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