Commit e1465d12 authored by Jérémy Lefaure's avatar Jérémy Lefaure Committed by Linus Torvalds

mm, thp: propagation of conditional compilation in khugepaged.c

Commit b46e756f ("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.

Link: http://lkml.kernel.org/r/20161114203448.24197-1-jeremy.lefaure@lse.epita.frSigned-off-by: default avatarJérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: default avatarHillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ded6e842
...@@ -103,6 +103,7 @@ static struct khugepaged_scan khugepaged_scan = { ...@@ -103,6 +103,7 @@ static struct khugepaged_scan khugepaged_scan = {
.mm_head = LIST_HEAD_INIT(khugepaged_scan.mm_head), .mm_head = LIST_HEAD_INIT(khugepaged_scan.mm_head),
}; };
#ifdef CONFIG_SYSFS
static ssize_t scan_sleep_millisecs_show(struct kobject *kobj, static ssize_t scan_sleep_millisecs_show(struct kobject *kobj,
struct kobj_attribute *attr, struct kobj_attribute *attr,
char *buf) char *buf)
...@@ -295,6 +296,7 @@ struct attribute_group khugepaged_attr_group = { ...@@ -295,6 +296,7 @@ struct attribute_group khugepaged_attr_group = {
.attrs = khugepaged_attr, .attrs = khugepaged_attr,
.name = "khugepaged", .name = "khugepaged",
}; };
#endif /* CONFIG_SYSFS */
#define VM_NO_KHUGEPAGED (VM_SPECIAL | VM_HUGETLB) #define VM_NO_KHUGEPAGED (VM_SPECIAL | VM_HUGETLB)
......
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