xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge tag 'printk-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

Browse Source 
Pull printk updates from Petr Mladek:

 - Herbert Xu made printk header file self-contained.

 - Andy Shevchenko and Sergey Senozhatsky cleaned up console->setup()
   error handling.

 - Andy Shevchenko did some cleanups (e.g. sparse warning) in vsprintf
   code.

 - Minor documentation updates.

* tag 'printk-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  lib/vsprintf: Force type of flags value for gfp_t
  lib/vsprintf: Replace custom spec to print decimals with generic one
  lib/vsprintf: Replace hidden BUILD_BUG_ON() with static_assert()
  printk: Make linux/printk.h self-contained
  doc:kmsg: explicitly state the return value in case of SEEK_CUR
  Replace HTTP links with HTTPS ones: vsprintf
  hvc: unify console setup naming
  console: Fix trivia typo 'change' -> 'chance'
  console: Propagate error code from console ->setup()
  tty: hvc: Return proper error code from console ->setup() hook
  serial: sunzilog: Return proper error code from console ->setup() hook
  serial: sunsab: Return proper error code from console ->setup() hook
  mips: Return proper error code from console ->setup() hook
This commit is contained in:
Linus Torvalds
2020-08-04 22:22:25 -07:00
parent 95ffa67658 57e60db3bc
commit a754292348
13 changed files with 86 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
kernel/printk/printk.c
View File

@@ -943,6 +943,14 @@ out:
return ret;
}
/*
* Be careful when modifying this function!!!
*
* Only few operations are supported because the device works only with the
* entire variable length messages (records). Non-standard values are
* returned in the other cases and has been this way for quite some time.
* User space applications might depend on this behavior.
*/
static loff_t devkmsg_llseek(struct file *file, loff_t offset, int whence)
{
struct devkmsg_user *user = file->private_data;
@@ -2658,7 +2666,7 @@ early_param("keep_bootcon", keep_bootcon_setup);
static int try_enable_new_console(struct console *newcon, bool user_specified)
{
struct console_cmdline *c;
int i;
int i, err;
for (i = 0, c = console_cmdline;
i < MAX_CMDLINECONSOLES && c->name[0];
@@ -2681,8 +2689,8 @@ static int try_enable_new_console(struct console *newcon, bool user_specified)
return 0;
if (newcon->setup &&
newcon->setup(newcon, c->options) != 0)
return -EIO;
(err = newcon->setup(newcon, c->options)) != 0)
return err;
}
newcon->flags |= CON_ENABLED;
if (i == preferred_console) {
@@ -2695,7 +2703,7 @@ static int try_enable_new_console(struct console *newcon, bool user_specified)
/*
* Some consoles, such as pstore and netconsole, can be enabled even
* without matching. Accept the pre-enabled consoles only when match()
* and setup() had a change to be called.
* and setup() had a chance to be called.
*/
if (newcon->flags & CON_ENABLED && c->user_specified == user_specified)
return 0;