* [PATCH v3] mm, thp: propagation of conditional compilation in khugepaged.c
@ 2016-11-14 20:34 Jérémy Lefaure
2016-11-14 20:42 ` Kirill A. Shutemov
2016-11-15 3:03 ` Hillf Danton
0 siblings, 2 replies; 3+ messages in thread
From: Jérémy Lefaure @ 2016-11-14 20:34 UTC (permalink / raw)
To: Andrew Morton, Kirill A. Shutemov; +Cc: linux-mm, Jérémy Lefaure
Commit b46e756f5e47 ("thp: extract khugepaged from mm/huge_memory.c")
moved code from huge_memory.c to khugepaged.c. Some of this code should
be compiled only when CONFIG_SYSFS is enabled but the condition around
this code was not moved into khugepaged.c. The result is a compilation
error when CONFIG_SYSFS is disabled:
mm/built-in.o: In function `khugepaged_defrag_store':
khugepaged.c:(.text+0x2d095): undefined reference to
`single_hugepage_flag_store'
mm/built-in.o: In function `khugepaged_defrag_show':
khugepaged.c:(.text+0x2d0ab): undefined reference to
`single_hugepage_flag_show'
This commit adds the #ifdef CONFIG_SYSFS around the code related to
sysfs.
Signed-off-by: JA(C)rA(C)my Lefaure <jeremy.lefaure@lse.epita.fr>
---
Sorry for the typo in v2. Thank you Kirill.
I hope that everything is ok this time.
mm/khugepaged.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 728d779..87e1a7ca 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -103,6 +103,7 @@ static struct khugepaged_scan khugepaged_scan = {
.mm_head = LIST_HEAD_INIT(khugepaged_scan.mm_head),
};
+#ifdef CONFIG_SYSFS
static ssize_t scan_sleep_millisecs_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
@@ -295,6 +296,7 @@ struct attribute_group khugepaged_attr_group = {
.attrs = khugepaged_attr,
.name = "khugepaged",
};
+#endif /* CONFIG_SYSFS */
#define VM_NO_KHUGEPAGED (VM_SPECIAL | VM_HUGETLB)
--
2.10.2
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v3] mm, thp: propagation of conditional compilation in khugepaged.c
2016-11-14 20:34 [PATCH v3] mm, thp: propagation of conditional compilation in khugepaged.c Jérémy Lefaure
@ 2016-11-14 20:42 ` Kirill A. Shutemov
2016-11-15 3:03 ` Hillf Danton
1 sibling, 0 replies; 3+ messages in thread
From: Kirill A. Shutemov @ 2016-11-14 20:42 UTC (permalink / raw)
To: Jérémy Lefaure; +Cc: Andrew Morton, Kirill A. Shutemov, linux-mm
On Mon, Nov 14, 2016 at 03:34:48PM -0500, Jeremy Lefaure wrote:
> Commit b46e756f5e47 ("thp: extract khugepaged from mm/huge_memory.c")
> moved code from huge_memory.c to khugepaged.c. Some of this code should
> be compiled only when CONFIG_SYSFS is enabled but the condition around
> this code was not moved into khugepaged.c. The result is a compilation
> error when CONFIG_SYSFS is disabled:
>
> mm/built-in.o: In function `khugepaged_defrag_store':
> khugepaged.c:(.text+0x2d095): undefined reference to
> `single_hugepage_flag_store'
> mm/built-in.o: In function `khugepaged_defrag_show':
> khugepaged.c:(.text+0x2d0ab): undefined reference to
> `single_hugepage_flag_show'
>
> This commit adds the #ifdef CONFIG_SYSFS around the code related to
> sysfs.
>
> Signed-off-by: Jeremy Lefaure <jeremy.lefaure@lse.epita.fr>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
--
Kirill A. Shutemov
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v3] mm, thp: propagation of conditional compilation in khugepaged.c
2016-11-14 20:34 [PATCH v3] mm, thp: propagation of conditional compilation in khugepaged.c Jérémy Lefaure
2016-11-14 20:42 ` Kirill A. Shutemov
@ 2016-11-15 3:03 ` Hillf Danton
1 sibling, 0 replies; 3+ messages in thread
From: Hillf Danton @ 2016-11-15 3:03 UTC (permalink / raw)
To: 'Jérémy Lefaure', 'Andrew Morton',
'Kirill A. Shutemov'
Cc: linux-mm
>
> Commit b46e756f5e47 ("thp: extract khugepaged from mm/huge_memory.c")
> moved code from huge_memory.c to khugepaged.c. Some of this code should
> be compiled only when CONFIG_SYSFS is enabled but the condition around
> this code was not moved into khugepaged.c. The result is a compilation
> error when CONFIG_SYSFS is disabled:
>
> mm/built-in.o: In function `khugepaged_defrag_store':
> khugepaged.c:(.text+0x2d095): undefined reference to
> `single_hugepage_flag_store'
> mm/built-in.o: In function `khugepaged_defrag_show':
> khugepaged.c:(.text+0x2d0ab): undefined reference to
> `single_hugepage_flag_show'
>
> This commit adds the #ifdef CONFIG_SYSFS around the code related to
> sysfs.
>
> Signed-off-by: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-11-14 20:42 ` Kirill A. Shutemov
2016-11-15 3:03 ` Hillf Danton
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