[0/7] debugfs: Add and use debugfs_create_xul()
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Message ID 20191021143742.14487-1-geert+renesas@glider.be
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  • debugfs: Add and use debugfs_create_xul()
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Geert Uytterhoeven Oct. 21, 2019, 2:37 p.m. UTC
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
types.

To work around this, some drivers call one of debugfs_create_x{32,64}(),
depending on the size of unsigned long.
Other driver 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.

Thanks for your comments!

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

 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        | 10 ++++++++++
 net/mac80211/debugfs_sta.c     | 17 +++--------------
 5 files changed, 25 insertions(+), 26 deletions(-)

Comments

Ulf Hansson Oct. 21, 2019, 3:20 p.m. UTC | #1
On Mon, 21 Oct 2019 at 16:37, Geert Uytterhoeven
<geert+renesas@glider.be> wrote:
>
>         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
> types.
>
> To work around this, some drivers call one of debugfs_create_x{32,64}(),
> depending on the size of unsigned long.
> Other driver 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.
>
> Thanks for your comments!

The mmc changes looks good to me. I guess we could funnel via Greg's
"debugfs" tree?

In such case, feel free to add my ack for the mmc changes.

Kind regards
Uffe

>
> 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
>
>  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        | 10 ++++++++++
>  net/mac80211/debugfs_sta.c     | 17 +++--------------
>  5 files changed, 25 insertions(+), 26 deletions(-)
>
> --
> 2.17.1
>
> Gr{oetje,eeting}s,
>
>                                                 Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> 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