80c87c5355
Commit3554530345("tty: drop tty_schedule_flip()") removed tty_schedule_flip() as all in-kernel users were properly converted over to use tty_flip_buffer_push(), but this function still needs to be here for older out-of-tree Android-only drivers to preserve the ABI. So provide a wrapper function for it to keep them alive for now. Bug: 161946584 Fixes:3554530345("tty: drop tty_schedule_flip()") Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I8893f07cf68bc3502ac6f0f7f0a26b0eec3726a2
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_TTY_FLIP_H
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#define _LINUX_TTY_FLIP_H
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#include <linux/tty_buffer.h>
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#include <linux/tty_port.h>
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struct tty_ldisc;
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extern int tty_buffer_set_limit(struct tty_port *port, int limit);
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extern unsigned int tty_buffer_space_avail(struct tty_port *port);
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extern int tty_buffer_request_room(struct tty_port *port, size_t size);
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extern int tty_insert_flip_string_flags(struct tty_port *port,
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const unsigned char *chars, const char *flags, size_t size);
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extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
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const unsigned char *chars, char flag, size_t size);
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extern int tty_prepare_flip_string(struct tty_port *port,
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unsigned char **chars, size_t size);
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extern void tty_flip_buffer_push(struct tty_port *port);
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int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
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static inline int tty_insert_flip_char(struct tty_port *port,
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unsigned char ch, char flag)
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{
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struct tty_buffer *tb = port->buf.tail;
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int change;
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change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
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if (!change && tb->used < tb->size) {
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if (~tb->flags & TTYB_NORMAL)
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*flag_buf_ptr(tb, tb->used) = flag;
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*char_buf_ptr(tb, tb->used++) = ch;
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return 1;
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}
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return __tty_insert_flip_char(port, ch, flag);
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}
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static inline int tty_insert_flip_string(struct tty_port *port,
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const unsigned char *chars, size_t size)
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{
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return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
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}
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int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
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const char *f, int count);
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extern void tty_buffer_lock_exclusive(struct tty_port *port);
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extern void tty_buffer_unlock_exclusive(struct tty_port *port);
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void tty_schedule_flip(struct tty_port *port);
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#endif /* _LINUX_TTY_FLIP_H */
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