A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 19:21:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

printk: split message size computation

Browse source 
We will want to recompute the message size when shrinking too long
messages.  Let's put the code into separate function.

The side effect of setting "pad_len" is not nice but it is worth removing
the code duplication.  Note that I will probably have one more usage for
this function when handling messages safe way in NMI context.

This patch does not change the existing behavior.

Signed-off-by: Petr Mladek <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Kay Sievers <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Petr Mladek 2014-06-04 16:11:31 -07:00 • committed by Linus Torvalds
commit 85c8704302
1 changed files with 13 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

16
kernel/printk/printk.c
View file

@ -339,6 +339,18 @@ static int log_make_free_space(u32 msg_size)
return -ENOMEM;
}
/* compute the message size including the padding bytes */
static u32 msg_used_size(u16 text_len, u16 dict_len, u32 *pad_len)
{
u32 size;
size = sizeof(struct printk_log) + text_len + dict_len;
*pad_len = (-size) & (LOG_ALIGN - 1);
size += *pad_len;
return size;
}
/* insert record into the buffer, discard old ones, update heads */
static void log_store(int facility, int level,
enum log_flags flags, u64 ts_nsec,
@ -349,9 +361,7 @@ static void log_store(int facility, int level,
u32 size, pad_len;
/* number of '\0' padding bytes to next message */
size = sizeof(struct printk_log) + text_len + dict_len;
pad_len = (-size) & (LOG_ALIGN - 1);
size += pad_len;
size = msg_used_size(text_len, dict_len, &pad_len);
/* if message does not fit empty log buffer, ignore it */
if (log_make_free_space(size))