[PATCH v2 0/7] debugfs: Add and use debugfs_create_xul()

From: Geert Uytterhoeven
Date: Fri Oct 25 2019 - 07:09:05 EST

Hi all,

The existing debugfs_create_ulong() function supports objects of
type "unsigned long", which are 32-bit or 64-bit depending on the
platform, in decimal form. To format objects in hexadecimal, various
debugfs_create_x*() functions exist, but all of them take fixed-size

To work around this, some drivers call one of debugfs_create_x{32,64}(),
depending on the size of unsigned long.
Other drivers just cast the value pointer to "u32 *" or "u64 *",
introducing portability bugs or data leaks in the process.

Hence this patch series adds a debugfs helper for "unsigned long"
objects in hexadecimal format, and converts drivers to make use of it.
It also contains two cleanups removing superfluous casts, which I added
to this series to avoid conflicts.

Changes compared to v1[1]:
- Add kerneldoc,
- Update Documentation/filesystems/debugfs.txt,
- Add Acked-by.

- The first patch now depends on "Documentation: debugfs: Document
debugfs helper for unsigned long values"[2], which Jon said he
applied to his tree.


[1] https://lore.kernel.org/lkml/20191021143742.14487-1-geert+renesas@xxxxxxxxx/
[2] https://lore.kernel.org/lkml/20191021150645.32440-1-geert+renesas@xxxxxxxxx/

Geert Uytterhoeven (7):
debugfs: Add debugfs_create_xul() for hexadecimal unsigned long
mac80211: Use debugfs_create_xul() helper
net: caif: Fix debugfs on 64-bit platforms
mmc: atmel-mci: Fix debugfs on 64-bit platforms
mmc: atmel-mci: Remove superfluous cast in debugfs_create_u32() call
mmc: dw_mmc: Fix debugfs on 64-bit platforms
mmc: dw_mmc: Remove superfluous cast in debugfs_create_u32() call

Documentation/filesystems/debugfs.txt | 5 ++++-
drivers/mmc/host/atmel-mci.c | 10 +++++-----
drivers/mmc/host/dw_mmc.c | 10 +++++-----
drivers/net/caif/caif_serial.c | 4 ++--
include/linux/debugfs.h | 21 +++++++++++++++++++++
net/mac80211/debugfs_sta.c | 17 +++--------------
6 files changed, 40 insertions(+), 27 deletions(-)




Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds