This series is a result of my attempt to fix a regression in lseek()
on 32-bit platforms. The regression manifested in lseek() unable to
seek past ~4GiB mark caused and was caused by usage of IS_ERR_VALUE()
(see commit messages for more detailed explanation).
Feedback is welcome!
Thanks,
Andrey Smirnov
Changes since [v1]:
- /dev/mem is split into /dev/mem and /dev/highmem on 64-bit
platforms
- .lseek() hooks are converted to return error code or 0 on
success
- A number of .lseek() related simplifcations that were done as a
percursor to the change above added to the series
- Added a fix for a bugs discovered when testing corener cases of
accessing /dev/mem (/dev/highmem)
[v1] http://lists.infradead.org/pipermail/barebox/2019-January/036756.html
Andrey Smirnov (19):
commands: Move mem_parse_options() to lib/misc.c
commands: Get rid of mem_rw_buf
commands: Move /dev/mem driver to drivers/misc
nvmem: Do not use DEVFS_IS_CHARACTER_DEV
common: firmware: Don't use FILE_SIZE_STREAM directly
devfs: Fix incorrect error check for cdev->ops->lseek()
fs: Update FILE position in lseek()
fs: Drop trivial .lseek() implementaitons in FS drivers
devfs: Drop dev_lseek_default()
fs: devfs: Change .lseek callbacks to return 'int'
fs: Do not use IS_ERR_VALUE() to validate offset in lseek()
fs: Simplify new position calculation in lseek()
fs: Share code between mem_write()/mem_read()
fs: Avoid division in mem_copy()
fs: Report actual data processed by mem_copy()
fs: Introduce mem_read_nofail()
commands: md: Do not use memmap()
drivers: mem: Create file to access second half of 64-bit memory
libfile: Fix incorrect lseek check in open_and_lseek()
arch/arm/mach-mxs/ocotp.c | 1 -
arch/sandbox/board/hostfile.c | 1 -
commands/Kconfig | 17 ++---
commands/Makefile | 1 -
commands/md.c | 18 ++---
commands/mem.c | 123 ----------------------------------
commands/memcmp.c | 16 ++---
commands/memcpy.c | 10 +--
commands/memset.c | 2 -
commands/stddev.c | 4 --
common/block.c | 1 -
common/firmware.c | 2 +-
common/ratp/md.c | 9 +--
drivers/base/regmap/regmap.c | 1 -
drivers/eeprom/at24.c | 1 -
drivers/eeprom/at25.c | 1 -
drivers/hw_random/core.c | 1 -
drivers/mfd/act8846.c | 1 -
drivers/mfd/lp3972.c | 1 -
drivers/mfd/mc34704.c | 1 -
drivers/mfd/mc9sdz60.c | 1 -
drivers/mfd/stmpe-i2c.c | 1 -
drivers/mfd/twl-core.c | 1 -
drivers/misc/Kconfig | 3 +
drivers/misc/Makefile | 1 +
drivers/misc/mem.c | 61 +++++++++++++++++
drivers/misc/sram.c | 1 -
drivers/mtd/core.c | 1 -
drivers/mtd/mtdoob.c | 1 -
drivers/mtd/mtdraw.c | 1 -
drivers/mtd/nand/nand-bb.c | 5 +-
drivers/mtd/ubi/barebox.c | 4 +-
drivers/net/e1000/eeprom.c | 2 -
drivers/net/ksz8864rmn.c | 1 -
drivers/net/phy/mdio_bus.c | 1 -
drivers/nvmem/core.c | 2 -
drivers/video/fb.c | 1 -
drivers/w1/slaves/w1_ds2431.c | 1 -
drivers/w1/slaves/w1_ds2433.c | 1 -
fs/bpkfs.c | 4 +-
fs/cramfs/cramfs.c | 7 --
fs/devfs-core.c | 110 +++++++++++++++++++++---------
fs/devfs.c | 14 ++--
fs/efi.c | 6 +-
fs/efivarfs.c | 8 ---
fs/ext4/ext_barebox.c | 8 ---
fs/fat/fat.c | 5 +-
fs/fs.c | 33 ++++-----
fs/nfs.c | 5 +-
fs/omap4_usbbootfs.c | 7 --
fs/pstore/fs.c | 4 +-
fs/ramfs.c | 7 --
fs/ratpfs.c | 9 ---
fs/smhfs.c | 10 ++-
fs/squashfs/squashfs.c | 8 ---
fs/tftp.c | 27 +++++---
fs/ubifs/ubifs.c | 8 ---
fs/uimagefs.c | 4 +-
include/driver.h | 9 +--
include/fs.h | 2 +-
lib/libfile.c | 3 +-
lib/misc.c | 42 ++++++++++++
62 files changed, 283 insertions(+), 359 deletions(-)
delete mode 100644 commands/mem.c
create mode 100644 drivers/misc/mem.c
--
2.20.1
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