From c481c707fe4b07783d9a2499a9bbbb94497e9b18 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 11 Jun 2009 13:04:27 +0100 Subject: [PATCH] tty: remove buffer special casing 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 Signed-off-by: Linus Torvalds --- drivers/char/n_tty.c | 11 ++--------- drivers/char/tty_audit.c | 10 ++-------- 2 files changed, 4 insertions(+), 17 deletions(-) diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c index f6f0e4ec2b51..b4b12b4f0ac4 100644 --- a/drivers/char/n_tty.c +++ b/drivers/char/n_tty.c @@ -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, diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c index 55ba6f142883..ac16fbec72d0 100644 --- a/drivers/char/tty_audit.c +++ b/drivers/char/tty_audit.c @@ -29,10 +29,7 @@ static struct tty_audit_buf *tty_audit_buf_alloc(int major, int minor, buf = kmalloc(sizeof(*buf), GFP_KERNEL); if (!buf) goto err; - if (PAGE_SIZE != N_TTY_BUF_SIZE) - buf->data = kmalloc(N_TTY_BUF_SIZE, GFP_KERNEL); - else - buf->data = (unsigned char *)__get_free_page(GFP_KERNEL); + buf->data = kmalloc(N_TTY_BUF_SIZE, GFP_KERNEL); if (!buf->data) goto err_buf; atomic_set(&buf->count, 1); @@ -52,10 +49,7 @@ err: static void tty_audit_buf_free(struct tty_audit_buf *buf) { WARN_ON(buf->valid != 0); - if (PAGE_SIZE != N_TTY_BUF_SIZE) - kfree(buf->data); - else - free_page((unsigned long)buf->data); + kfree(buf->data); kfree(buf); } -- 2.20.1