lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

tty: remove buffer special casing

Browse Source 
Long long ago a 4K kmalloc allocated two pages so the tty layer used the
page allocator, except on some machines where the page size was huge. This was
removed from the core tty layer with the tty buffer re-implementation but not
from tty_audit or the n_tty ldisc.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
2009-06-11 13:04:27 +01:00
committed by Linus Torvalds
parent aba6593bf7
commit c481c707fe
2 changed files with 4 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/char/n_tty.c
View File

@@ -76,19 +76,12 @@
static inline unsigned char *alloc_buf(void)
{
gfp_t prio = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
if (PAGE_SIZE != N_TTY_BUF_SIZE)
return kmalloc(N_TTY_BUF_SIZE, prio);
else
return (unsigned char *)__get_free_page(prio);
return kmalloc(N_TTY_BUF_SIZE, prio);
}
static inline void free_buf(unsigned char *buf)
{
if (PAGE_SIZE != N_TTY_BUF_SIZE)
kfree(buf);
else
free_page((unsigned long) buf);
kfree(buf);
}
static inline int tty_put_user(struct tty_struct *tty, unsigned char x,