lkml.org 
[lkml]   [2018]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectRe: [PATCH 1/3] powerpc/nohash: remove hash related code from nohash headers.
Date
kbuild test robot <lkp@intel.com> writes:

> Hi Christophe,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on powerpc/next]
> [also build test ERROR on v4.17-rc2 next-20180426]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Christophe-Leroy/powerpc-nohash-remove-hash-related-code-from-nohash-headers/20180425-182026
> base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> config: powerpc-ppc64e_defconfig (attached as .config)
> compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> make.cross ARCH=powerpc
>
> All errors (new ones prefixed by >>):
>
> In file included from arch/powerpc/include/asm/nohash/pgtable.h:6:0,
> from arch/powerpc/include/asm/pgtable.h:19,
> from include/linux/memremap.h:8,
> from include/linux/mm.h:27,
> from include/linux/mman.h:5,
> from arch/powerpc/kernel/asm-offsets.c:22:
> arch/powerpc/include/asm/nohash/64/pgtable.h: In function '__ptep_test_and_clear_young':
>>> arch/powerpc/include/asm/nohash/64/pgtable.h:214:6: error: implicit declaration of function 'pte_young'; did you mean 'pte_pud'? [-Werror=implicit-function-declaration]
> if (pte_young(*ptep))
> ^~~~~~~~~
> pte_pud

Urk.

There's a circular dependency here.

I fixed it with the patch below, which seems to be the least worst
solution. Possibly we can clean things up further in future.

cheers

diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index 140f8e74b478..987a658b18e1 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -267,6 +267,11 @@ static inline void __ptep_set_access_flags(struct mm_struct *mm,
pte_update(ptep, clr, set);
}

+static inline int pte_young(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_ACCESSED;
+}
+
#define __HAVE_ARCH_PTE_SAME
#define pte_same(A,B) ((pte_val(A) ^ pte_val(B)) == 0)

diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h
index e8de7cb4d3fb..6ac8381f4c7a 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable.h
@@ -204,6 +204,11 @@ static inline unsigned long pte_update(struct mm_struct *mm,
return old;
}

+static inline int pte_young(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_ACCESSED;
+}
+
static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/include/asm/nohash/pgtable.h
index 077472640b35..2160be2e4339 100644
--- a/arch/powerpc/include/asm/nohash/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/pgtable.h
@@ -17,7 +17,6 @@ static inline int pte_write(pte_t pte)
}
static inline int pte_read(pte_t pte) { return 1; }
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
-static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; }
static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; }
static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); }
\
 
 \ /
  Last update: 2018-05-04 13:18    [W:0.062 / U:4.832 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site