diff options
| -rw-r--r-- | drivers/tty/vt/vt.c | 44 | ||||
| -rw-r--r-- | include/linux/console_struct.h | 3 |
2 files changed, 20 insertions, 27 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 4e79cda0c2be..3adb7f409524 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2052,6 +2052,8 @@ enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, /* console_lock is held (except via vc_init()) */ static void reset_terminal(struct vc_data *vc, int do_clear) { + unsigned int i; + vc->vc_top = 0; vc->vc_bottom = vc->vc_rows; vc->vc_state = ESnormal; @@ -2082,14 +2084,9 @@ static void reset_terminal(struct vc_data *vc, int do_clear) default_attr(vc); update_attr(vc); - vc->vc_tab_stop[0] = - vc->vc_tab_stop[1] = - vc->vc_tab_stop[2] = - vc->vc_tab_stop[3] = - vc->vc_tab_stop[4] = - vc->vc_tab_stop[5] = - vc->vc_tab_stop[6] = - vc->vc_tab_stop[7] = 0x01010101; + bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT); + for (i = 0; i < VC_TABSTOPS_COUNT; i += 8) + set_bit(i, vc->vc_tab_stop); vc->vc_bell_pitch = DEFAULT_BELL_PITCH; vc->vc_bell_duration = DEFAULT_BELL_DURATION; @@ -2147,11 +2144,13 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) return; case 9: vc->vc_pos -= (vc->state.x << 1); - while (vc->state.x < vc->vc_cols - 1) { - vc->state.x++; - if (vc->vc_tab_stop[7 & (vc->state.x >> 5)] & (1 << (vc->state.x & 31))) - break; - } + + vc->state.x = find_next_bit(vc->vc_tab_stop, + min(vc->vc_cols - 1, VC_TABSTOPS_COUNT), + vc->state.x + 1); + if (vc->state.x >= VC_TABSTOPS_COUNT) + vc->state.x = vc->vc_cols - 1; + vc->vc_pos += (vc->state.x << 1); notify_write(vc, '\t'); return; @@ -2210,7 +2209,8 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) lf(vc); return; case 'H': - vc->vc_tab_stop[7 & (vc->state.x >> 5)] |= (1 << (vc->state.x & 31)); + if (vc->state.x < VC_TABSTOPS_COUNT) + set_bit(vc->state.x, vc->vc_tab_stop); return; case 'Z': respond_ID(tty); @@ -2421,18 +2421,10 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) respond_ID(tty); return; case 'g': - if (!vc->vc_par[0]) - vc->vc_tab_stop[7 & (vc->state.x >> 5)] &= ~(1 << (vc->state.x & 31)); - else if (vc->vc_par[0] == 3) { - vc->vc_tab_stop[0] = - vc->vc_tab_stop[1] = - vc->vc_tab_stop[2] = - vc->vc_tab_stop[3] = - vc->vc_tab_stop[4] = - vc->vc_tab_stop[5] = - vc->vc_tab_stop[6] = - vc->vc_tab_stop[7] = 0; - } + if (!vc->vc_par[0] && vc->state.x < VC_TABSTOPS_COUNT) + set_bit(vc->state.x, vc->vc_tab_stop); + else if (vc->vc_par[0] == 3) + bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT); return; case 'm': csi_m(vc); diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h index 623e86689c3a..81f7afcd061a 100644 --- a/include/linux/console_struct.h +++ b/include/linux/console_struct.h @@ -21,6 +21,7 @@ struct uni_pagedir; struct uni_screen; #define NPAR 16 +#define VC_TABSTOPS_COUNT 256U enum vc_intensity { VCI_HALF_BRIGHT, @@ -147,7 +148,7 @@ struct vc_data { unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */ unsigned char vc_utf_count; int vc_utf_char; - unsigned int vc_tab_stop[8]; /* Tab stops. 256 columns. */ + DECLARE_BITMAP(vc_tab_stop, VC_TABSTOPS_COUNT); /* Tab stops. 256 columns. */ unsigned char vc_palette[16*3]; /* Colour palette for VGA+ */ unsigned short * vc_translate; unsigned int vc_resize_user; /* resize request from user */ |