cregit-Linux how code gets into the kernel

Release 4.15 include/linux/vt_buffer.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
/*
 *      include/linux/vt_buffer.h -- Access to VT screen buffer
 *
 *      (c) 1998 Martin Mares <mj@ucw.cz>
 *
 *      This is a set of macros and functions which are used in the
 *      console driver and related code to access the screen buffer.
 *      In most cases the console works with simple in-memory buffer,
 *      but when handling hardware text mode consoles, we store
 *      the foreground console directly in video memory.
 */

#ifndef _LINUX_VT_BUFFER_H_

#define _LINUX_VT_BUFFER_H_

#include <linux/string.h>

#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
#include <asm/vga.h>
#endif

#ifndef VT_BUF_HAVE_RW

#define scr_writew(val, addr) (*(addr) = (val))

#define scr_readw(addr) (*(addr))
#endif

#ifndef VT_BUF_HAVE_MEMSETW

static inline void scr_memsetw(u16 *s, u16 c, unsigned int count) { #ifdef VT_BUF_HAVE_RW count /= 2; while (count--) scr_writew(c, s++); #else memset16(s, c, count / 2); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3566.04%266.67%
Matthew Wilcox1833.96%133.33%
Total53100.00%3100.00%

#endif #ifndef VT_BUF_HAVE_MEMCPYW
static inline void scr_memcpyw(u16 *d, const u16 *s, unsigned int count) { #ifdef VT_BUF_HAVE_RW count /= 2; while (count--) scr_writew(scr_readw(s++), d++); #else memcpy(d, s, count); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4171.93%375.00%
Matthew Wilcox1628.07%125.00%
Total57100.00%4100.00%

#endif #ifndef VT_BUF_HAVE_MEMMOVEW
static inline void scr_memmovew(u16 *d, const u16 *s, unsigned int count) { #ifdef VT_BUF_HAVE_RW if (d < s) scr_memcpyw(d, s, count); else { count /= 2; d += count; s += count; while (count--) scr_writew(scr_readw(--s), --d); } #else memmove(d, s, count); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6780.72%375.00%
Matthew Wilcox1619.28%125.00%
Total83100.00%4100.00%

#endif #endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20479.07%571.43%
Matthew Wilcox5320.54%114.29%
Greg Kroah-Hartman10.39%114.29%
Total258100.00%7100.00%
Directory: include/linux
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