Eric Lee / linux-smarc-t335x-v3.2

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Commit dc8c85871c9728c5fddca6854a191fd41eb9438c

Authored by Kay Sievers
Committed by Greg Kroah-Hartman
1 parent 45aaae9c51
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

PTY: add kernel parameter to overwrite legacy pty count 

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Showing 3 changed files with 11 additions and 3 deletions Side-by-side Diff

Documentation/kernel-parameters.txt
Diff comments   View file @ dc8c858
... ... @@ -1430,6 +1430,10 @@
1430 1430 pt. [PARIDE]
1431 1431 See Documentation/paride.txt.
1432 1432  
  1433 + pty.legacy_count=
  1434 + [KNL] Number of legacy pty's. Overwrites compiled-in
  1435 + default number.
  1436 +
1433 1437 quiet [KNL] Disable most log messages
1434 1438  
1435 1439 r128= [HW,DRM]
... ... @@ -248,14 +248,19 @@
248 248 return -ENOIOCTLCMD;
249 249 }
250 250  
  251 +static int legacy_count = CONFIG_LEGACY_PTY_COUNT;
  252 +module_param(legacy_count, int, 0);
  253 +
251 254 static void __init legacy_pty_init(void)
252 255 {
  256 + if (legacy_count <= 0)
  257 + return;
253 258  
254   - pty_driver = alloc_tty_driver(NR_PTYS);
  259 + pty_driver = alloc_tty_driver(legacy_count);
255 260 if (!pty_driver)
256 261 panic("Couldn't allocate pty driver");
257 262  
258   - pty_slave_driver = alloc_tty_driver(NR_PTYS);
  263 + pty_slave_driver = alloc_tty_driver(legacy_count);
259 264 if (!pty_slave_driver)
260 265 panic("Couldn't allocate pty slave driver");
261 266  
... ... @@ -21,7 +21,6 @@
21 21 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
22 22 * hardcoded at present.)
23 23 */
24   -#define NR_PTYS CONFIG_LEGACY_PTY_COUNT /* Number of legacy ptys */
25 24 #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
26 25 #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
27 26 #define NR_LDISCS 17