[PATCH v4 00/12] fs/seq_file: introduce seq_hex_dump() helper

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

This introduces a new helper and switches current users to use it. All are
compiled tested, hexdump and kmemleak are tested by their test suits.

Changelog v4:
- hexdump is amended to return value from which we can check an overflow
 (patches 1/12 - 4/12)
- seq_hex_dump pushes bytes directly to buffer and returns an error in case of
  overflow (addresses Al Viro's comment)
- append Acked-by for patches 8/12 and 9/12
- convert more users (patches 10/12 - 12/12)

Changelog v3:
- append Mauro's Ack
- rebase on top of recent linux-next

Changelog v2:
- append Acked-by and Reviewed-by tags
- update commit messages in patches 3/5. and 5/5
- update line size to be 32 bytes instead of 16 in patch 3/5
- Joe found that output is changed in patch 4/5, thus I update commit message
  there

Andy Shevchenko (12):
  hexdump: introduce test suite
  hexdump: fix ascii column for the tail of a dump
  hexdump: do few calculations ahead
  hexdump: makes it return amount of bytes placed in buffer
  seq_file: provide an analogue of print_hex_dump()
  saa7164: convert to seq_hex_dump()
  crypto: qat - use seq_hex_dump() to dump buffers
  parisc: use seq_hex_dump() to dump buffers
  [S390] zcrypt: use seq_hex_dump() to dump buffers
  staging: unisys: use seq_hex_dump() to dump buffers
  kmemleak: use seq_hex_dump() to dump buffers
  wil6210: use seq_hex_dump() to dump buffers

 .../crypto/qat/qat_common/adf_transport_debug.c    |  16 +-
 drivers/media/pci/saa7164/saa7164-core.c           |  31 +---
 drivers/net/wireless/ath/wil6210/debugfs.c         |  32 +---
 drivers/parisc/ccio-dma.c                          |  14 +-
 drivers/parisc/sba_iommu.c                         |  11 +-
 drivers/s390/crypto/zcrypt_api.c                   |  10 +-
 .../unisys/visorchannel/visorchannel_funcs.c       |  26 +--
 fs/seq_file.c                                      |  50 ++++++
 include/linux/printk.h                             |   6 +-
 include/linux/seq_file.h                           |   4 +
 lib/Kconfig.debug                                  |   3 +
 lib/Makefile                                       |   4 +-
 lib/hexdump.c                                      | 105 +++++++-----
 lib/test-hexdump.c                                 | 180 +++++++++++++++++++++
 mm/kmemleak.c                                      |  21 +--
 15 files changed, 337 insertions(+), 176 deletions(-)
 create mode 100644 lib/test-hexdump.c

-- 
2.1.0