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| author |   Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-22 11:06:32 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-26 14:08:50 -0300 |
| commit | cce8ccca80d8388982133192d0a6d9dc2e8ed712 (patch) | |
| tree | 4e37956f86eba2c619fe2a4d56af0b5c993411ae /drivers/staging/media/ipu3 | |
| parent | media: ov9650: add a sanity check (diff) | |
| download | linux-dev-cce8ccca80d8388982133192d0a6d9dc2e8ed712.tar.xz linux-dev-cce8ccca80d8388982133192d0a6d9dc2e8ed712.zip | |
media: use the BIT() macro
As warned by cppcheck:
[drivers/media/dvb-frontends/cx24123.c:434]: (error) Shifting signed 32-bit value by 31 bits is undefined behaviour
[drivers/media/pci/bt8xx/bttv-input.c:87]: (error) Shifting signed 32-bit value by 31 bits is undefined behaviour
[drivers/media/pci/bt8xx/bttv-input.c:98]: (error) Shifting signed 32-bit value by 31 bits is undefined behaviour
...
[drivers/media/v4l2-core/v4l2-ioctl.c:1391]: (error) Shifting signed 32-bit value by 31 bits is undefined behaviour
There are lots of places where we're doing 1 << 31. That's bad,
as, depending on the architecture, this has an undefined behavior.
The BIT() macro is already prepared to handle this, so, let's
just switch all "1 << number" macros by BIT(number) at the header files
with has 1 << 31.
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> # exynos4-is and s3c-camif
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # omap3isp, vsp1, xilinx, wl128x and ipu3
Reviewed-by: Benoit Parrot <bparrot@ti.com> # am437x and ti-vpe
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/staging/media/ipu3')
| -rw-r--r-- | drivers/staging/media/ipu3/ipu3-tables.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/staging/media/ipu3/ipu3-tables.h b/drivers/staging/media/ipu3/ipu3-tables.h index a1bf3286f380..9f719c48b432 100644 --- a/drivers/staging/media/ipu3/ipu3-tables.h +++ b/drivers/staging/media/ipu3/ipu3-tables.h @@ -4,6 +4,8 @@ #ifndef __IPU3_TABLES_H #define __IPU3_TABLES_H +#include <linux/bitops.h> + #include "ipu3-abi.h" #define IMGU_BDS_GRANULARITY 32 /* Downscaling granularity */ @@ -12,7 +14,7 @@ #define IMGU_SCALER_DOWNSCALE_4TAPS_LEN 128 #define IMGU_SCALER_DOWNSCALE_2TAPS_LEN 64 -#define IMGU_SCALER_FP ((u32)1 << 31) /* 1.0 in fixed point */ +#define IMGU_SCALER_FP BIT(31) /* 1.0 in fixed point */ #define IMGU_XNR3_VMEM_LUT_LEN 16 |