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tty: Remove private constant from global namespace

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TTY_BUFFER_PAGE is only used within drivers/tty/tty_buffer.c;
relocate to that file scope.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-06-15 09:36:16 -04:00 committed by Greg Kroah-Hartman
parent a7c8d58c79
commit 9114fe8ccf
2 changed files with 10 additions and 11 deletions
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10
drivers/tty/tty_buffer.c
View File

@ -28,6 +28,16 @@
*/
#define TTYB_MEM_LIMIT 65536
/*
* 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)
/**
* tty_buffer_lock_exclusive - gain exclusive access to buffer

11
include/linux/tty.h
View File

@ -53,17 +53,6 @@ static inline char *flag_buf_ptr(struct tty_buffer *b, int ofs)
return (char *)char_buf_ptr(b, ofs) + b->size;
}
/*
* 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 tty_buffer *head; /* Queue head */
struct work_struct work;