From: Johannes Berg <johannes@sipsolutions.net>

The symbol mangle_path conflicts with a gcov symbol which
can break the build of ARCH=um with gcov, and it's also
not very specific and descriptive.

Rename mangle_path() to seq_mangle_path(), and also remove
the export since it's not needed or used by any modules.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Alex Hung <alex.hung@amd.com>
---

This is a revived patch. The original can be found at
https://lkml.iu.edu/hypermail/linux/kernel/2103.1/06604.html

 fs/seq_file.c            | 11 +++++------
 include/linux/seq_file.h |  2 +-
 lib/seq_buf.c            |  2 +-
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 4745db2a34d1..456c78719fd0 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -428,7 +428,7 @@ EXPORT_SYMBOL(seq_bprintf);
 #endif /* CONFIG_BINARY_PRINTF */

 /**
- *	mangle_path -	mangle and copy path to buffer beginning
+ *	seq_mangle_path -	mangle and copy path to buffer beginning
  *	@s: buffer start
  *	@p: beginning of path in above buffer
  *	@esc: set of characters that need escaping
@@ -438,7 +438,7 @@ EXPORT_SYMBOL(seq_bprintf);
  *      Returns pointer past last written character in @s, or NULL in case of
  *      failure.
  */
-char *mangle_path(char *s, const char *p, const char *esc)
+char *seq_mangle_path(char *s, const char *p, const char *esc)
 {
 	while (s <= p) {
 		char c = *p++;
@@ -457,7 +457,6 @@ char *mangle_path(char *s, const char *p, const char *esc)
 	}
 	return NULL;
 }
-EXPORT_SYMBOL(mangle_path);

 /**
  * seq_path - seq_file interface to print a pathname
@@ -477,7 +476,7 @@ int seq_path(struct seq_file *m, const struct path *path, const char *esc)
 	if (size) {
 		char *p = d_path(path, buf, size);
 		if (!IS_ERR(p)) {
-			char *end = mangle_path(buf, p, esc);
+			char *end = seq_mangle_path(buf, p, esc);
 			if (end)
 				res = end - buf;
 		}
@@ -520,7 +519,7 @@ int seq_path_root(struct seq_file *m, const struct path *path,
 			return SEQ_SKIP;
 		res = PTR_ERR(p);
 		if (!IS_ERR(p)) {
-			char *end = mangle_path(buf, p, esc);
+			char *end = seq_mangle_path(buf, p, esc);
 			if (end)
 				res = end - buf;
 			else
@@ -544,7 +543,7 @@ int seq_dentry(struct seq_file *m, struct dentry *dentry, const char *esc)
 	if (size) {
 		char *p = dentry_path(dentry, buf, size);
 		if (!IS_ERR(p)) {
-			char *end = mangle_path(buf, p, esc);
+			char *end = seq_mangle_path(buf, p, esc);
 			if (end)
 				res = end - buf;
 		}
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 2fb266ea69fa..dc0e8c62d9e0 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -104,7 +104,7 @@ static inline void seq_setwidth(struct seq_file *m, size_t size)
 }
 void seq_pad(struct seq_file *m, char c);

-char *mangle_path(char *s, const char *p, const char *esc);
+char *seq_mangle_path(char *s, const char *p, const char *esc);
 int seq_open(struct file *, const struct seq_operations *);
 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
 ssize_t seq_read_iter(struct kiocb *iocb, struct iov_iter *iter);
diff --git a/lib/seq_buf.c b/lib/seq_buf.c
index f3f3436d60a9..91b2d0e12158 100644
--- a/lib/seq_buf.c
+++ b/lib/seq_buf.c
@@ -320,7 +320,7 @@ int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc)
 	if (size) {
 		char *p = d_path(path, buf, size);
 		if (!IS_ERR(p)) {
-			char *end = mangle_path(buf, p, esc);
+			char *end = seq_mangle_path(buf, p, esc);
 			if (end)
 				res = end - buf;
 		}
--
2.43.0