smaps: only define clear_refs for CONFIG_MMU

/proc/pid/clear_refs is only defined in the CONFIG_MMU case, so make sure we
don't have any references to clear_refs_smap() in generic procfs code.

Signed-off-by: David Rientjes <[email protected]>
Signed-off-by: David Howells <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3c41149dea8875ba1431d25acb969ec75f197770..a5fa1fdafc4e6df68df2cc87626f0d8d85bd95a6 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -708,6 +708,7 @@ static const struct file_operations proc_oom_adjust_operations = {
        .write          = oom_adjust_write,
 };
 
+#ifdef CONFIG_MMU
 static ssize_t clear_refs_write(struct file *file, const char __user *buf,
                                size_t count, loff_t *ppos)
 {
@@ -741,6 +742,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 static struct file_operations proc_clear_refs_operations = {
        .write          = clear_refs_write,
 };
+#endif
 
 #ifdef CONFIG_AUDITSYSCALL
 #define TMPBUFLEN 21