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debugfs: Fix !DEBUG_FS debugfs_create_automount 

[ Upstream commit 4250b047039d324e0ff65267c8beb5bad5052a86 ]

If DEBUG_FS=n, compile fails with the following error:

kernel/trace/trace.c: In function 'tracing_init_dentry':
kernel/trace/trace.c:8658:9: error: passing argument 3 of 'debugfs_create_automount' from incompatible pointer type [-Werror=incompatible-pointer-types]
 8658 |         trace_automount, NULL);
      |         ^~~~~~~~~~~~~~~
      |         |
      |         struct vfsmount * (*)(struct dentry *, void *)
In file included from kernel/trace/trace.c:24:
./include/linux/debugfs.h:206:25: note: expected 'struct vfsmount * (*)(void *)' but argument is of type 'struct vfsmount * (*)(struct dentry *, void *)'
  206 |      struct vfsmount *(*f)(void *),
      |      ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
Link: https://lore.kernel.org/r/20191121102021787.MLMY.25002.ppp.dion.ne.jp@dmta0003.auone-net.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kusanagi Kouichi 2019-11-21 19:20:21 +09:00 committed by Greg Kroah-Hartman
parent 14bbbfbafe
commit 80f7667422
1 changed files with 3 additions and 2 deletions
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5
include/linux/debugfs.h
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@ -54,6 +54,8 @@ static const struct file_operations __fops = { \
.llseek = no_llseek, \
}
typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
#if defined(CONFIG_DEBUG_FS)
struct dentry *debugfs_lookup(const char *name, struct dentry *parent);
@ -75,7 +77,6 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
const char *dest);
typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
struct dentry *debugfs_create_automount(const char *name,
struct dentry *parent,
debugfs_automount_t f,
@ -203,7 +204,7 @@ static inline struct dentry *debugfs_create_symlink(const char *name,
static inline struct dentry *debugfs_create_automount(const char *name,
struct dentry *parent,
struct vfsmount *(*f)(void *),
debugfs_automount_t f,
void *data)
{
return ERR_PTR(-ENODEV);