mm, thp: propagation of conditional compilation in khugepaged.c
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.
Link: http://lkml.kernel.org/r/20161114203448.24197-1-jeremy.lefaure@lse.epita.fr
Signed-off-by: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 @@
.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 @@
.attrs = khugepaged_attr,
.name = "khugepaged",
};
+#endif /* CONFIG_SYSFS */
#define VM_NO_KHUGEPAGED (VM_SPECIAL | VM_HUGETLB)