From: Peter Hurley <[email protected]> The flags field of struct uart_port can only be safely modified if the port mutex is held; no other lock prevents concurrent changes from corrupting the field.
Signed-off-by: Peter Hurley <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> (cherry picked from commit 8a949b07e4062cbd07e04e6a47249e69ca65b944) Signed-off-by: Chang Rebecca Swee Fun <[email protected]> --- include/linux/serial_core.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index a8c38a1..8681f74 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -156,6 +156,7 @@ struct uart_port { unsigned long sysrq; /* sysrq timeout */ #endif + /* flags must be updated while holding port mutex */ upf_t flags; #define UPF_FOURPORT ((__force upf_t) (1 << 1)) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
