[PATCH v3 1/6] usb: gadget: ffs: remove ENTER() macro

* [PATCH v3 1/6] usb: gadget: ffs: remove ENTER() macro
@ 2023-03-27 10:12 Linyu Yuan
  2023-03-27 10:12 ` [PATCH v3 2/6] usb: gadget: f_fs: add more function with struct ffs_data *ffs parameter Linyu Yuan
                   ` (4 more replies)
  0 siblings, 5 replies; 21+ messages in thread
From: Linyu Yuan @ 2023-03-27 10:12 UTC (permalink / raw)
  To: Greg Kroah-Hartman; +Cc: linux-usb, Linyu Yuan

ENTER() used to show function name which called during runtime, ftrace can
be used to get same information, let's remove it.

Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
---
v3: fix build issue Reported-by: kernel test robot <lkp@intel.com>
v2: split to several changes according to v1 comments
v1: https://lore.kernel.org/linux-usb/1679481369-30094-1-git-send-email-quic_linyyuan@quicinc.com/

 drivers/usb/gadget/function/f_fs.c | 94 --------------------------------------
 drivers/usb/gadget/function/u_fs.h |  2 -
 drivers/usb/gadget/legacy/g_ffs.c  |  9 ----
 3 files changed, 105 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index a277c70..8830847 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -335,8 +335,6 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
 	ssize_t ret;
 	char *data;
 
-	ENTER();
-
 	/* Fast check if setup was canceled */
 	if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
 		return -EIDRM;
@@ -512,8 +510,6 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
 	size_t n;
 	int ret;
 
-	ENTER();
-
 	/* Fast check if setup was canceled */
 	if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
 		return -EIDRM;
@@ -612,8 +608,6 @@ static int ffs_ep0_open(struct inode *inode, struct file *file)
 {
 	struct ffs_data *ffs = inode->i_private;
 
-	ENTER();
-
 	if (ffs->state == FFS_CLOSING)
 		return -EBUSY;
 
@@ -627,8 +621,6 @@ static int ffs_ep0_release(struct inode *inode, struct file *file)
 {
 	struct ffs_data *ffs = file->private_data;
 
-	ENTER();
-
 	ffs_data_closed(ffs);
 
 	return 0;
@@ -640,8 +632,6 @@ static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
 	struct usb_gadget *gadget = ffs->gadget;
 	long ret;
 
-	ENTER();
-
 	if (code == FUNCTIONFS_INTERFACE_REVMAP) {
 		struct ffs_function *func = ffs->func;
 		ret = func ? ffs_func_revmap_intf(func, value) : -ENODEV;
@@ -715,7 +705,6 @@ static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req)
 {
 	struct ffs_io_data *io_data = req->context;
 
-	ENTER();
 	if (req->status)
 		io_data->status = req->status;
 	else
@@ -856,8 +845,6 @@ static void ffs_epfile_async_io_complete(struct usb_ep *_ep,
 	struct ffs_io_data *io_data = req->context;
 	struct ffs_data *ffs = io_data->ffs;
 
-	ENTER();
-
 	io_data->status = req->status ? req->status : req->actual;
 	usb_ep_free_request(_ep, req);
 
@@ -1161,8 +1148,6 @@ ffs_epfile_open(struct inode *inode, struct file *file)
 {
 	struct ffs_epfile *epfile = inode->i_private;
 
-	ENTER();
-
 	if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
 		return -ENODEV;
 
@@ -1179,8 +1164,6 @@ static int ffs_aio_cancel(struct kiocb *kiocb)
 	unsigned long flags;
 	int value;
 
-	ENTER();
-
 	spin_lock_irqsave(&epfile->ffs->eps_lock, flags);
 
 	if (io_data && io_data->ep && io_data->req)
@@ -1198,8 +1181,6 @@ static ssize_t ffs_epfile_write_iter(struct kiocb *kiocb, struct iov_iter *from)
 	struct ffs_io_data io_data, *p = &io_data;
 	ssize_t res;
 
-	ENTER();
-
 	if (!is_sync_kiocb(kiocb)) {
 		p = kzalloc(sizeof(io_data), GFP_KERNEL);
 		if (!p)
@@ -1235,8 +1216,6 @@ static ssize_t ffs_epfile_read_iter(struct kiocb *kiocb, struct iov_iter *to)
 	struct ffs_io_data io_data, *p = &io_data;
 	ssize_t res;
 
-	ENTER();
-
 	if (!is_sync_kiocb(kiocb)) {
 		p = kzalloc(sizeof(io_data), GFP_KERNEL);
 		if (!p)
@@ -1284,8 +1263,6 @@ ffs_epfile_release(struct inode *inode, struct file *file)
 {
 	struct ffs_epfile *epfile = inode->i_private;
 
-	ENTER();
-
 	__ffs_epfile_read_buffer_free(epfile);
 	ffs_data_closed(epfile->ffs);
 
@@ -1299,8 +1276,6 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
 	struct ffs_ep *ep;
 	int ret;
 
-	ENTER();
-
 	if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
 		return -ENODEV;
 
@@ -1399,8 +1374,6 @@ ffs_sb_make_inode(struct super_block *sb, void *data,
 {
 	struct inode *inode;
 
-	ENTER();
-
 	inode = new_inode(sb);
 
 	if (inode) {
@@ -1432,8 +1405,6 @@ static struct dentry *ffs_sb_create_file(struct super_block *sb,
 	struct dentry	*dentry;
 	struct inode	*inode;
 
-	ENTER();
-
 	dentry = d_alloc_name(sb->s_root, name);
 	if (!dentry)
 		return NULL;
@@ -1468,8 +1439,6 @@ static int ffs_sb_fill(struct super_block *sb, struct fs_context *fc)
 	struct inode	*inode;
 	struct ffs_data	*ffs = data->ffs_data;
 
-	ENTER();
-
 	ffs->sb              = sb;
 	data->ffs_data       = NULL;
 	sb->s_fs_info        = ffs;
@@ -1521,8 +1490,6 @@ static int ffs_fs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	struct fs_parse_result result;
 	int opt;
 
-	ENTER();
-
 	opt = fs_parse(fc, ffs_fs_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
@@ -1572,8 +1539,6 @@ static int ffs_fs_get_tree(struct fs_context *fc)
 	struct ffs_data	*ffs;
 	int ret;
 
-	ENTER();
-
 	if (!fc->source)
 		return invalf(fc, "No source specified");
 
@@ -1640,8 +1605,6 @@ static int ffs_fs_init_fs_context(struct fs_context *fc)
 static void
 ffs_fs_kill_sb(struct super_block *sb)
 {
-	ENTER();
-
 	kill_litter_super(sb);
 	if (sb->s_fs_info)
 		ffs_data_closed(sb->s_fs_info);
@@ -1663,8 +1626,6 @@ static int functionfs_init(void)
 {
 	int ret;
 
-	ENTER();
-
 	ret = register_filesystem(&ffs_fs_type);
 	if (!ret)
 		pr_info("file system registered\n");
@@ -1676,8 +1637,6 @@ static int functionfs_init(void)
 
 static void functionfs_cleanup(void)
 {
-	ENTER();
-
 	pr_info("unloading\n");
 	unregister_filesystem(&ffs_fs_type);
 }
@@ -1690,15 +1649,11 @@ static void ffs_data_reset(struct ffs_data *ffs);
 
 static void ffs_data_get(struct ffs_data *ffs)
 {
-	ENTER();
-
 	refcount_inc(&ffs->ref);
 }
 
 static void ffs_data_opened(struct ffs_data *ffs)
 {
-	ENTER();
-
 	refcount_inc(&ffs->ref);
 	if (atomic_add_return(1, &ffs->opened) == 1 &&
 			ffs->state == FFS_DEACTIVATED) {
@@ -1709,8 +1664,6 @@ static void ffs_data_opened(struct ffs_data *ffs)
 
 static void ffs_data_put(struct ffs_data *ffs)
 {
-	ENTER();
-
 	if (refcount_dec_and_test(&ffs->ref)) {
 		pr_info("%s(): freeing\n", __func__);
 		ffs_data_clear(ffs);
@@ -1729,8 +1682,6 @@ static void ffs_data_closed(struct ffs_data *ffs)
 	struct ffs_epfile *epfiles;
 	unsigned long flags;
 
-	ENTER();
-
 	if (atomic_dec_and_test(&ffs->opened)) {
 		if (ffs->no_disconnect) {
 			ffs->state = FFS_DEACTIVATED;
@@ -1765,8 +1716,6 @@ static struct ffs_data *ffs_data_new(const char *dev_name)
 	if (!ffs)
 		return NULL;
 
-	ENTER();
-
 	ffs->io_completion_wq = alloc_ordered_workqueue("%s", 0, dev_name);
 	if (!ffs->io_completion_wq) {
 		kfree(ffs);
@@ -1793,8 +1742,6 @@ static void ffs_data_clear(struct ffs_data *ffs)
 	struct ffs_epfile *epfiles;
 	unsigned long flags;
 
-	ENTER();
-
 	ffs_closed(ffs);
 
 	BUG_ON(ffs->gadget);
@@ -1826,8 +1773,6 @@ static void ffs_data_clear(struct ffs_data *ffs)
 
 static void ffs_data_reset(struct ffs_data *ffs)
 {
-	ENTER();
-
 	ffs_data_clear(ffs);
 
 	ffs->raw_descs_data = NULL;
@@ -1861,8 +1806,6 @@ static int functionfs_bind(struct ffs_data *ffs, struct usb_composite_dev *cdev)
 	struct usb_gadget_strings **lang;
 	int first_id;
 
-	ENTER();
-
 	if (WARN_ON(ffs->state != FFS_ACTIVE
 		 || test_and_set_bit(FFS_FL_BOUND, &ffs->flags)))
 		return -EBADFD;
@@ -1894,8 +1837,6 @@ static int functionfs_bind(struct ffs_data *ffs, struct usb_composite_dev *cdev)
 
 static void functionfs_unbind(struct ffs_data *ffs)
 {
-	ENTER();
-
 	if (!WARN_ON(!ffs->gadget)) {
 		/* dequeue before freeing ep0req */
 		usb_ep_dequeue(ffs->gadget->ep0, ffs->ep0req);
@@ -1914,8 +1855,6 @@ static int ffs_epfiles_create(struct ffs_data *ffs)
 	struct ffs_epfile *epfile, *epfiles;
 	unsigned i, count;
 
-	ENTER();
-
 	count = ffs->eps_count;
 	epfiles = kcalloc(count, sizeof(*epfiles), GFP_KERNEL);
 	if (!epfiles)
@@ -1946,8 +1885,6 @@ static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count)
 {
 	struct ffs_epfile *epfile = epfiles;
 
-	ENTER();
-
 	for (; count; --count, ++epfile) {
 		BUG_ON(mutex_is_locked(&epfile->mutex));
 		if (epfile->dentry) {
@@ -2064,8 +2001,6 @@ static int __must_check ffs_do_single_desc(char *data, unsigned len,
 	u8 length;
 	int ret;
 
-	ENTER();
-
 	/* At least two bytes are required: length and type */
 	if (len < 2) {
 		pr_vdebug("descriptor too short\n");
@@ -2204,8 +2139,6 @@ static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
 	unsigned long num = 0;
 	int current_class = -1;
 
-	ENTER();
-
 	for (;;) {
 		int ret;
 
@@ -2243,8 +2176,6 @@ static int __ffs_data_do_entity(enum ffs_entity_type type,
 	struct ffs_desc_helper *helper = priv;
 	struct usb_endpoint_descriptor *d;
 
-	ENTER();
-
 	switch (type) {
 	case FFS_DESCRIPTOR:
 		break;
@@ -2329,8 +2260,6 @@ static int __must_check ffs_do_single_os_desc(char *data, unsigned len,
 	int ret;
 	const unsigned _len = len;
 
-	ENTER();
-
 	/* loop over all ext compat/ext prop descriptors */
 	while (feature_count--) {
 		ret = entity(type, h, data, len, priv);
@@ -2352,8 +2281,6 @@ static int __must_check ffs_do_os_descs(unsigned count,
 	const unsigned _len = len;
 	unsigned long num = 0;
 
-	ENTER();
-
 	for (num = 0; num < count; ++num) {
 		int ret;
 		enum ffs_os_desc_type type;
@@ -2416,8 +2343,6 @@ static int __ffs_data_do_os_desc(enum ffs_os_desc_type type,
 	struct ffs_data *ffs = priv;
 	u8 length;
 
-	ENTER();
-
 	switch (type) {
 	case FFS_OS_DESC_EXT_COMPAT: {
 		struct usb_ext_compat_desc *d = data;
@@ -2493,8 +2418,6 @@ static int __ffs_data_got_descs(struct ffs_data *ffs,
 	int ret = -EINVAL, i;
 	struct ffs_desc_helper helper;
 
-	ENTER();
-
 	if (get_unaligned_le32(data + 4) != len)
 		goto error;
 
@@ -2625,8 +2548,6 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
 	const char *data = _data;
 	struct usb_string *s;
 
-	ENTER();
-
 	if (len < 16 ||
 	    get_unaligned_le32(data) != FUNCTIONFS_STRINGS_MAGIC ||
 	    get_unaligned_le32(data + 4) != len)
@@ -3085,8 +3006,6 @@ static inline struct f_fs_opts *ffs_do_functionfs_bind(struct usb_function *f,
 	struct ffs_data *ffs_data;
 	int ret;
 
-	ENTER();
-
 	/*
 	 * Legacy gadget triggers binding in functionfs_ready_callback,
 	 * which already uses locking; taking the same lock here would
@@ -3163,8 +3082,6 @@ static int _ffs_func_bind(struct usb_configuration *c,
 	vla_item_with_sz(d, char, raw_descs, ffs->raw_descs_length);
 	char *vlabuf;
 
-	ENTER();
-
 	/* Has descriptors only for speeds gadget does not support */
 	if (!(full | high | super))
 		return -ENOTSUPP;
@@ -3368,8 +3285,6 @@ static int ffs_func_setup(struct usb_function *f,
 	unsigned long flags;
 	int ret;
 
-	ENTER();
-
 	pr_vdebug("creq->bRequestType = %02x\n", creq->bRequestType);
 	pr_vdebug("creq->bRequest     = %02x\n", creq->bRequest);
 	pr_vdebug("creq->wValue       = %04x\n", le16_to_cpu(creq->wValue));
@@ -3444,13 +3359,11 @@ static bool ffs_func_req_match(struct usb_function *f,
 
 static void ffs_func_suspend(struct usb_function *f)
 {
-	ENTER();
 	ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_SUSPEND);
 }
 
 static void ffs_func_resume(struct usb_function *f)
 {
-	ENTER();
 	ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_RESUME);
 }
 
@@ -3614,7 +3527,6 @@ static void ffs_func_unbind(struct usb_configuration *c,
 	unsigned count = ffs->eps_count;
 	unsigned long flags;
 
-	ENTER();
 	if (ffs->func == func) {
 		ffs_func_eps_disable(func);
 		ffs->func = NULL;
@@ -3654,8 +3566,6 @@ static struct usb_function *ffs_alloc(struct usb_function_instance *fi)
 {
 	struct ffs_function *func;
 
-	ENTER();
-
 	func = kzalloc(sizeof(*func), GFP_KERNEL);
 	if (!func)
 		return ERR_PTR(-ENOMEM);
@@ -3756,7 +3666,6 @@ static int ffs_acquire_dev(const char *dev_name, struct ffs_data *ffs_data)
 	int ret = 0;
 	struct ffs_dev *ffs_dev;
 
-	ENTER();
 	ffs_dev_lock();
 
 	ffs_dev = _ffs_find_dev(dev_name);
@@ -3779,7 +3688,6 @@ static int ffs_acquire_dev(const char *dev_name, struct ffs_data *ffs_data)
 
 static void ffs_release_dev(struct ffs_dev *ffs_dev)
 {
-	ENTER();
 	ffs_dev_lock();
 
 	if (ffs_dev && ffs_dev->mounted) {
@@ -3801,7 +3709,6 @@ static int ffs_ready(struct ffs_data *ffs)
 	struct ffs_dev *ffs_obj;
 	int ret = 0;
 
-	ENTER();
 	ffs_dev_lock();
 
 	ffs_obj = ffs->private_data;
@@ -3834,7 +3741,6 @@ static void ffs_closed(struct ffs_data *ffs)
 	struct f_fs_opts *opts;
 	struct config_item *ci;
 
-	ENTER();
 	ffs_dev_lock();
 
 	ffs_obj = ffs->private_data;
diff --git a/drivers/usb/gadget/function/u_fs.h b/drivers/usb/gadget/function/u_fs.h
index f102ec2..4b3365f 100644
--- a/drivers/usb/gadget/function/u_fs.h
+++ b/drivers/usb/gadget/function/u_fs.h
@@ -32,8 +32,6 @@
 #  define ffs_dump_mem(prefix, ptr, len) do { } while (0)
 #endif /* VERBOSE_DEBUG */
 
-#define ENTER()    pr_vdebug("%s()\n", __func__)
-
 struct f_fs_opts;
 
 struct ffs_dev {
diff --git a/drivers/usb/gadget/legacy/g_ffs.c b/drivers/usb/gadget/legacy/g_ffs.c
index ae6d8f7..0978546 100644
--- a/drivers/usb/gadget/legacy/g_ffs.c
+++ b/drivers/usb/gadget/legacy/g_ffs.c
@@ -180,8 +180,6 @@ static int __init gfs_init(void)
 	int i;
 	int ret = 0;
 
-	ENTER();
-
 	if (func_num < 2) {
 		gfs_single_func = true;
 		func_num = 1;
@@ -242,8 +240,6 @@ static void __exit gfs_exit(void)
 {
 	int i;
 
-	ENTER();
-
 	if (gfs_registered)
 		usb_composite_unregister(&gfs_driver);
 	gfs_registered = false;
@@ -316,8 +312,6 @@ static int gfs_bind(struct usb_composite_dev *cdev)
 #endif
 	int ret, i;
 
-	ENTER();
-
 	if (missing_funcs)
 		return -ENODEV;
 #if defined CONFIG_USB_FUNCTIONFS_ETH
@@ -445,9 +439,6 @@ static int gfs_unbind(struct usb_composite_dev *cdev)
 {
 	int i;
 
-	ENTER();
-
-
 #ifdef CONFIG_USB_FUNCTIONFS_RNDIS
 	usb_put_function(f_rndis);
 	usb_put_function_instance(fi_rndis);
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 21+ messages in thread