AuxXxilium/linux_dsm_epyc7002
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02042a4cf4
linux_dsm_epyc7002/drivers/tty/serial
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Gustavo A. R. Silva 02042a4cf4 serial: 8250_pci: Replace zero-length array with flexible-array member 
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by
this change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://lore.kernel.org/r/20200213004426.GA7886@embeddedor.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-13 12:00:23 -08:00
..
8250 serial: 8250_pci: Replace zero-length array with flexible-array member 2020-02-13 12:00:23 -08:00
cpm_uart tty/serial: Migrate cpm_uart to use has_sysrq 2019-12-18 15:04:46 +01:00
jsm
21285.c tty: serial: 21285: stop using the unused[] variable from struct uart_port 2019-12-19 20:10:28 +01:00
altera_jtaguart.c
altera_uart.c
amba-pl010.c tty/serial: Migrate amba-pl01* to use has_sysrq 2019-12-18 15:04:44 +01:00
amba-pl011.c tty/serial: Migrate amba-pl01* to use has_sysrq 2019-12-18 15:04:44 +01:00
amba-pl011.h
apbuart.c tty/serial: Migrate apbuart to use has_sysrq 2019-12-18 15:04:44 +01:00
apbuart.h
ar933x_uart.c
arc_uart.c tty/serial: Migrate arc_uart to use has_sysrq 2019-12-18 15:04:45 +01:00
atmel_serial.c tty/serial: atmel: use true,false for bool variable 2020-01-14 14:34:04 +01:00
atmel_serial.h
bcm63xx_uart.c tty/serial: Migrate bcm63xx_uart to use has_sysrq 2019-12-18 15:04:43 +01:00
clps711x.c tty/serial: Migrate clps711x to use has_sysrq 2019-12-18 15:04:46 +01:00
digicolor-usart.c
dz.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
dz.h
earlycon-arm-semihost.c
earlycon-riscv-sbi.c
earlycon.c
efm32-uart.c tty/serial: Migrate efm32-uart to use has_sysrq 2019-12-18 15:04:47 +01:00
fsl_linflexuart.c tty/serial: Migrate fsl_linflexuart to use has_sysrq 2019-12-18 15:04:48 +01:00
fsl_lpuart.c tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP 2020-01-06 20:22:36 +01:00
icom.c
icom.h
ifx6x60.c serial: ifx6x60: add missed pm_runtime_disable 2019-11-18 12:47:06 +01:00
ifx6x60.h
imx.c serial: imx: fix a race condition in receive path 2020-01-22 10:22:31 +01:00
ip22zilog.c tty/serial: Migrate ip22zilog to use has_sysrq 2019-12-18 15:04:50 +01:00
ip22zilog.h
Kconfig tty: serial: Kconfig: Allow SERIAL_QCOM_GENI_CONSOLE to be enabled if SERIAL_QCOM_GENI is a module 2020-01-10 14:01:33 +01:00
kgdb_nmi.c tty/serial: kgdb_nmi: use true,false for bool variable 2020-01-14 14:34:04 +01:00
kgdboc.c kgdboc: Use for_each_console() helper 2020-02-10 12:34:43 -08:00
lantiq.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
lpc32xx_hs.c
Makefile {tty: serial, nand: onenand}: samsung: rename to fix build warning 2019-11-18 18:49:11 +01:00
max310x.c
max3100.c
mcf.c
men_z135_uart.c
meson_uart.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
milbeaut_usio.c tty/serial: Migrate milbeaut_usio to use has_sysrq 2019-12-18 15:04:51 +01:00
mpc52xx_uart.c tty/serial: mpc52xx_uart: Don't zero port->sysrq 2019-12-18 15:04:52 +01:00
mps2-uart.c
msm_serial.c tty: serial: msm_serial: RX SW/FIFO mode fallback 2020-01-14 14:07:51 +01:00
mux.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
mvebu-uart.c
mxs-auart.c tty/serial: Migrate mxs-auart to use has_sysrq 2019-12-18 15:04:53 +01:00
omap-serial.c tty/serial: Migrate omap-serial to use has_sysrq 2019-12-18 15:04:54 +01:00
owl-uart.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
pch_uart.c tty/serial: pmac_zilog: Don't check port->sysrq 2019-12-18 15:04:56 +01:00
pic32_uart.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
pic32_uart.h
pmac_zilog.c tty/serial: Migrate pmac_zilog to use has_sysrq 2019-12-18 15:04:56 +01:00
pmac_zilog.h
pnx8xxx_uart.c tty/serial: Migrate pnx8xxx_uart to use has_sysrq 2019-12-18 15:04:57 +01:00
pxa.c tty/serial: Migrate pxa to use has_sysrq 2019-12-18 15:04:57 +01:00
qcom_geni_serial.c tty: serial: qcom_geni_serial: Move loopback support to TIOCM_LOOP 2020-01-06 20:22:34 +01:00
rda-uart.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
rp2.c
sa1100.c tty/serial: Migrate sa1100 to use has_sysrq 2019-12-18 15:04:59 +01:00
samsung_tty.c serial: samsung: Rename Exynos to lowercase 2020-01-06 20:22:33 +01:00
sb1250-duart.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
sc16is7xx.c serial: sc16is7xx: Replace zero-length array with flexible-array member 2020-02-13 12:00:23 -08:00
sccnxp.c tty/serial: Migrate sccnxp to use has_sysrq 2019-12-18 15:05:00 +01:00
serial_core.c serial_core: Move sysrq functions from header file 2020-01-10 17:48:02 +01:00
serial_mctrl_gpio.c
serial_mctrl_gpio.h
serial_txx9.c tty/serial: Migrate serial_txx9 to use has_sysrq 2019-12-18 15:05:01 +01:00
serial-tegra.c tty: serial: tegra: Optimize DMA buffer synchronization 2020-01-14 14:07:50 +01:00
sh-sci.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
sh-sci.h
sifive.c
sirfsoc_uart.c
sirfsoc_uart.h
sprd_serial.c Merge 5.5-rc3 into tty-next 2019-12-23 06:59:19 -05:00
st-asc.c tty: st-asc: switch to using devm_gpiod_get() 2020-01-10 14:01:33 +01:00
stm32-usart.c tty/serial: Migrate stm32-usart to use has_sysrq 2019-12-18 15:05:04 +01:00
stm32-usart.h
suncore.c
sunhv.c tty/serial: Migrate sunhv to use has_sysrq 2019-12-18 15:05:05 +01:00
sunsab.c tty/serial: Migrate sunsab to use has_sysrq 2019-12-18 15:05:05 +01:00
sunsab.h
sunsu.c tty/serial: Migrate sunsu to use has_sysrq 2019-12-18 15:05:06 +01:00
sunzilog.c tty/serial: Migrate sunzilog to use has_sysrq 2019-12-18 15:05:08 +01:00
sunzilog.h
tegra-tcu.c
timbuart.c
timbuart.h
uartlite.c Revert "serial-uartlite: Move the uart register" 2019-11-14 06:29:08 +08:00
ucc_uart.c ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
vr41xx_siu.c tty/serial: Migrate vr41xx_siu to use has_sysrq 2019-12-18 15:05:09 +01:00
vt8500_serial.c tty/serial: Migrate vt8500_serial to use has_sysrq 2019-12-18 15:05:09 +01:00
xilinx_uartps.c serial: xilinx_uartps: set_mctrl sets RTS and DTR 2020-01-14 14:34:04 +01:00
zs.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
zs.h