Le 04/05/2018 à 13:17, Michael Ellerman a écrit :
kbuild test robot <[email protected]> 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.
Oops, I just sent you a new version of the patch not using pte_young()
anymore. I'll let you decide what to do.
Christophe
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); }
