diff options
Diffstat (limited to 'include/linux/tty.h')
-rw-r--r-- | include/linux/tty.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index f0f43d08d8b8..e9c57e9bb7f2 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -68,6 +68,17 @@ struct tty_buffer { unsigned long data[0]; }; +/* + * We default to dicing tty buffer allocations to this many characters + * in order to avoid multiple page allocations. We know the size of + * tty_buffer itself but it must also be taken into account that the + * the buffer is 256 byte aligned. See tty_buffer_find for the allocation + * logic this must match + */ + +#define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF) + + struct tty_bufhead { struct delayed_work work; spinlock_t lock; |