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SubjectRe: [Intel-gfx] [PATCH 3/4] lib/hexdump.c: Replace ascii bool in hex_dump_to_buffer with flags
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On 10/04/2019 04:17, Alastair D'Silva wrote:
> From: Alastair D'Silva <alastair@d-silva.org>
>
> In order to support additional features in hex_dump_to_buffer, replace
> the ascii bool parameter with flags.
>
> Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
> ---
> drivers/gpu/drm/i915/intel_engine_cs.c | 2 +-
> drivers/isdn/hardware/mISDN/mISDNisar.c | 6 ++++--
> drivers/mailbox/mailbox-test.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 2 +-
> drivers/net/ethernet/synopsys/dwc-xlgmac-common.c | 2 +-
> drivers/net/wireless/ath/ath10k/debug.c | 3 ++-
> drivers/net/wireless/intel/iwlegacy/3945-mac.c | 2 +-
> drivers/platform/chrome/wilco_ec/debugfs.c | 3 ++-
> drivers/scsi/scsi_logging.c | 8 +++-----
> drivers/staging/fbtft/fbtft-core.c | 2 +-
> fs/seq_file.c | 3 ++-
> include/linux/printk.h | 2 +-
> lib/hexdump.c | 15 ++++++++-------
> lib/test_hexdump.c | 5 +++--
> 14 files changed, 31 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index 49fa43ff02ba..fb133e729f9a 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -1318,7 +1318,7 @@ static void hexdump(struct drm_printer *m, const void *buf, size_t len)
> WARN_ON_ONCE(hex_dump_to_buffer(buf + pos, len - pos,
> rowsize, sizeof(u32),
> line, sizeof(line),
> - false) >= sizeof(line));
> + 0) >= sizeof(line));
> drm_printf(m, "[%04zx] %s\n", pos, line);
>
> prev = buf + pos;

i915 code here actually does something I think is more interesting than
HEXDUMP_SUPPRESS_0X**. It replaces any N repeating lines with a single star
marker. For example:

00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
*
00000040 00000001 00000000 00000018 00000002 00000001 00000000 00000018 00000000
00000060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000003
00000080 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
*
000000c0 00000002 00000000 00000000 00000000 00000000 00000000 00000000 00000000
000000e0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
*

If or when you end up with this feature in your series you can therefore
replace the whole implementation of hexdump in the above file.

Regards,

Tvrtko

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