| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <22204a4a-9c10-4aca-8159-a0e69c74cb34@kernel.org>
Date: Thu, 7 Aug 2025 08:43:44 +0200
From: Jiri Slaby <jirislaby@...nel.org>
To: Arnd Bergmann <arnd@...db.de>,
Abinash Singh <abinashsinghlalotra@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Sunil V L <sunilvl@...tanamicro.com>,
Uwe Kleine-König <u.kleine-koenig@...libre.com>,
linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [RFC PATCH 1/2] tty: serial/8250: Fix build warning in
serial8250_probe_acpi()
On 07. 08. 25, 7:25, Jiri Slaby wrote:
> On 06. 08. 25, 9:01, Arnd Bergmann wrote:
>> Note how serial8250_register_8250_port() ands up just copying
>> individual members of the passed uart_8250_port structure into
>> the global array of the same type, so one way of addressing
>> this would be to use a structure for initialization that only
>> contains a subset of the uart_8250_port members and can still
>> be allocated on the stack, or possibly be constant.
>
> Yes:
> https://lore.kernel.org/all/
> f84c2ee3-77b4-41c4-8517-26dfb44a2276@...nel.org/
As a PoC, these members from uart_8250_port are really used in
serial8250_register_8250_port():
struct uart_8250_port2 {
long unsigned int iobase; /* 0 8 */
resource_size_t mapbase; /* 8 8 */
unsigned char * membase; /* 16 8 */
long unsigned int irqflags; /* 24 8 */
upf_t flags; /* 32 8 */
enum uart_iotype iotype; /* 40 4 */
unsigned int tx_loadsz; /* 44 4 */
unsigned int type; /* 48 4 */
u32 overrun_backoff_time_ms; /* 52
4 */
u32 capabilities; /* 56 4 */
unsigned int line; /* 60 4 */
/* --- cacheline 1 boundary (64 bytes) --- */
unsigned int uartclk; /* 64 4 */
unsigned int ctrl_id; /* 68 4 */
unsigned int port_id; /* 72 4 */
unsigned int irq; /* 76 4 */
unsigned int fifosize; /* 80 4 */
u16 bugs; /* 84 2 */
u16 lsr_save_mask; /* 86 2 */
unsigned char regshift; /* 88 1 */
unsigned char hub6; /* 89 1 */
/* XXX 6 bytes hole, try to pack */
resource_size_t mapsize; /* 96 8 */
struct serial_rs485 rs485; /* 104 32 */
/* --- cacheline 2 boundary (128 bytes) was 8 bytes ago --- */
struct serial_rs485 rs485_supported; /* 136 32 */
void * private_data; /* 168 8 */
struct uart_8250_dma * dma; /* 176 8 */
void (*rs485_start_tx)(struct
uart_8250_port *, bool); /* 184 8 */
/* --- cacheline 3 boundary (192 bytes) --- */
void (*rs485_stop_tx)(struct
uart_8250_port *, bool); /* 192 8 */
void (*throttle)(struct uart_port *); /*
200 8 */
void (*unthrottle)(struct uart_port *);
/* 208 8 */
u32 (*serial_in)(struct uart_port *,
unsigned int); /* 216 8 */
void (*serial_out)(struct uart_port *,
unsigned int, u32); /* 224 8 */
void (*set_termios)(struct uart_port *,
struct ktermios *, const struct ktermios *); /* 232 8 */
void (*set_ldisc)(struct uart_port *,
struct ktermios *); /* 240 8 */
unsigned int (*get_mctrl)(struct uart_port *); /*
248 8 */
/* --- cacheline 4 boundary (256 bytes) --- */
void (*set_mctrl)(struct uart_port *,
unsigned int); /* 256 8 */
unsigned int (*get_divisor)(struct uart_port *,
unsigned int, unsigned int *); /* 264 8 */
void (*set_divisor)(struct uart_port *,
unsigned int, unsigned int, unsigned int); /* 272 8 */
int (*startup)(struct uart_port *); /*
280 8 */
void (*shutdown)(struct uart_port *); /*
288 8 */
int (*handle_irq)(struct uart_port *);
/* 296 8 */
void (*pm)(struct uart_port *, unsigned
int, unsigned int); /* 304 8 */
void (*handle_break)(struct uart_port *);
/* 312 8 */
/* --- cacheline 5 boundary (320 bytes) --- */
int (*rs485_config)(struct uart_port *,
struct ktermios *, struct serial_rs485 *); /* 320 8 */
struct device * dev; /* 328 8 */
u32 (*dl_read)(struct uart_8250_port *);
/* 336 8 */
void (*dl_write)(struct uart_8250_port *,
u32); /* 344 8 */
/* size: 352, cachelines: 6, members: 46 */
/* sum members: 346, holes: 1, sum holes: 6 */
/* last cacheline: 32 bytes */
};
--
js
suse labs
Powered by blists - more mailing lists