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| author | Jiri Slaby <jslaby@suse.cz> | 2020-08-18 11:56:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-18 14:45:21 +0300 |
| commit | 9e6363784e3f1e90416b81c0d0cd16f6bfb304af (patch) | |
| tree | abd666a81364e8962cdae4231a9e091558595d6c /drivers/tty/vt/vc_screen.c | |
| parent | 2665bef49f96df1a541b4e71e7b27bf631f7667c (diff) | |
| download | linux-9e6363784e3f1e90416b81c0d0cd16f6bfb304af.tar.xz | |
vc_screen: extract vcs_write_buf_noattr
vcs_write is too long to be readable. Extract buffer handling w/o
attributes from there to a separate function.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200818085706.12163-7-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt/vc_screen.c')
| -rw-r--r-- | drivers/tty/vt/vc_screen.c | 55 |
1 files changed, 34 insertions, 21 deletions
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c index 2571d9067b08..62e6d240f0dd 100644 --- a/drivers/tty/vt/vc_screen.c +++ b/drivers/tty/vt/vc_screen.c @@ -454,6 +454,33 @@ unlock_out: return ret; } +static u16 *vcs_write_buf_noattr(struct vc_data *vc, const char *con_buf, + unsigned int pos, unsigned int count, bool viewed, u16 **org0) +{ + u16 *org; + unsigned int col, maxcol = vc->vc_cols; + + *org0 = org = screen_pos(vc, pos, viewed); + col = pos % maxcol; + pos += maxcol - col; + + while (count > 0) { + unsigned char c = *con_buf++; + + count--; + vcs_scr_writew(vc, + (vcs_scr_readw(vc, org) & 0xff00) | c, org); + org++; + if (++col == maxcol) { + org = screen_pos(vc, pos, viewed); + col = 0; + pos += maxcol; + } + } + + return org; +} + static ssize_t vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { @@ -544,29 +571,15 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) * under the lock using the local kernel buffer. */ - con_buf0 = con_buf; - orig_count = this_round; - maxcol = vc->vc_cols; - p = pos; if (!attr) { - org0 = org = screen_pos(vc, p, viewed); - col = p % maxcol; - p += maxcol - col; - - while (this_round > 0) { - unsigned char c = *con_buf0++; - - this_round--; - vcs_scr_writew(vc, - (vcs_scr_readw(vc, org) & 0xff00) | c, org); - org++; - if (++col == maxcol) { - org = screen_pos(vc, p, viewed); - col = 0; - p += maxcol; - } - } + org = vcs_write_buf_noattr(vc, con_buf, pos, this_round, + viewed, &org0); } else { + con_buf0 = con_buf; + orig_count = this_round; + maxcol = vc->vc_cols; + p = pos; + if (p < HEADER_SIZE) { char header[HEADER_SIZE]; |