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[SERIAL] Make uart_info flags a bitwise type 

The potential for confusing the flags is fairly high.  Make
uart_info's flags a bitwise type so sparse can check that the
right flag definitions are used with the right structure.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
hifive-unleashed-5.1
Russell King 2006-01-21 22:50:36 +00:00 committed by Russell King
parent ba899dbc03
commit 747c8a5594
1 changed files with 10 additions and 8 deletions
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18
include/linux/serial_core.h
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@ -287,6 +287,9 @@ struct uart_state {
};
#define UART_XMIT_SIZE PAGE_SIZE
typedef unsigned int __bitwise__ uif_t;
/*
* This is the state information which is only valid when the port
* is open; it may be freed by the core driver once the device has
@ -296,17 +299,16 @@ struct uart_state {
struct uart_info {
struct tty_struct *tty;
struct circ_buf xmit;
unsigned int flags;
uif_t flags;
/*
* These are the flags that specific to info->flags, and reflect our
* internal state. They can not be accessed via port->flags. Low
* level drivers must not change these, but may query them instead.
* Definitions for info->flags. These are _private_ to serial_core, and
* are specific to this structure. They may be queried by low level drivers.
*/
#define UIF_CHECK_CD (1 << 25)
#define UIF_CTS_FLOW (1 << 26)
#define UIF_NORMAL_ACTIVE (1 << 29)
#define UIF_INITIALIZED (1 << 31)
#define UIF_CHECK_CD ((__force uif_t) (1 << 25))
#define UIF_CTS_FLOW ((__force uif_t) (1 << 26))
#define UIF_NORMAL_ACTIVE ((__force uif_t) (1 << 29))
#define UIF_INITIALIZED ((__force uif_t) (1 << 31))
int blocked_open;