From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Cc: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-serial <linux-serial@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
William Hubbs <w.d.hubbs@gmail.com>,
Chris Brannon <chris@the-brannons.com>,
Kirk Reiser <kirk@reisers.ca>,
Samuel Thibault <samuel.thibault@ens-lyon.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Arnd Bergmann <arnd@arndb.de>, Max Staudt <max@enpas.org>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Dario Binacchi <dario.binacchi@amarulasolutions.com>,
Andreas Koensgen <ajk@comnets.uni-bremen.de>,
Jeremy Kerr <jk@codeconstruct.com.au>,
Matt Johnston <matt@codeconstruct.com.au>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>,
Peter Ujfalusi <peter.ujfalusi@gmail.com>
Subject: Re: [PATCH 16/36] tty: use u8 for chars
Date: Thu, 31 Aug 2023 21:33:12 +0300 [thread overview]
Message-ID: <ZPDc6P2tp4lQzrKA@smile.fi.intel.com> (raw)
In-Reply-To: <27366cad-30b2-e326-8d8f-c6fe17cf4899@linux.intel.com>
On Fri, Aug 11, 2023 at 01:28:56PM +0300, Ilpo Järvinen wrote:
> On Thu, 10 Aug 2023, Jiri Slaby (SUSE) wrote:
...
> > @@ -22,9 +22,9 @@ struct tty_buffer {
> > unsigned long data[];
> > };
> >
> > -static inline unsigned char *char_buf_ptr(struct tty_buffer *b, int ofs)
> > +static inline u8 *char_buf_ptr(struct tty_buffer *b, int ofs)
> > {
> > - return ((unsigned char *)b->data) + ofs;
> > + return ((u8 *)b->data) + ofs;
> > }
>
> Any particular reason why b->data is left unsigned long?
It might be the performance issue due to unaligned accesses on some
architectures. But I'm just speculating...
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-08-31 18:33 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 9:14 [PATCH 00/36] tty: type unifications -- part I Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 01/36] tty: xtensa/iss: drop unneeded tty_operations hooks Jiri Slaby (SUSE)
2023-08-10 12:37 ` Max Filippov
2023-08-10 9:14 ` [PATCH 02/36] tty: ldisc: document that ldops are optional Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 03/36] tty: remove dummy tty_ldisc_ops::poll() implementations Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 04/36] tty: n_null: remove optional ldops Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 05/36] tty: change tty_write_lock()'s ndelay parameter to bool Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 06/36] tty: tty_port: rename 'disc' to 'ld' Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 07/36] tty: drop tty_debug_wait_until_sent() Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 08/36] tty: make tty_change_softcar() more understandable Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 09/36] tty: make tty_port_client_operations operate with u8 Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 10/36] tty: make counts in tty_port_client_operations hooks size_t Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 11/36] tty: switch receive_buf() counts to size_t Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 12/36] tty: switch count in tty_ldisc_receive_buf() " Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 13/36] tty: can327: unify error paths in can327_ldisc_rx() Jiri Slaby (SUSE)
2023-08-11 21:32 ` Max Staudt
2023-08-10 9:14 ` [PATCH 14/36] tty: can327, move overflow test inside can327_ldisc_rx()'s loop Jiri Slaby (SUSE)
2023-08-11 21:34 ` Max Staudt
2023-08-10 9:14 ` [PATCH 15/36] tty: make tty_ldisc_ops::*buf*() hooks operate on size_t Jiri Slaby (SUSE)
2023-08-10 12:02 ` Mark Brown
2023-08-11 21:34 ` Max Staudt
2023-08-10 9:14 ` [PATCH 16/36] tty: use u8 for chars Jiri Slaby (SUSE)
2023-08-10 12:04 ` Mark Brown
2023-08-11 10:28 ` Ilpo Järvinen
2023-08-14 6:35 ` Jiri Slaby
2023-08-31 18:33 ` Andy Shevchenko [this message]
2023-08-11 21:34 ` Max Staudt
2023-08-10 9:14 ` [PATCH 17/36] tty: use u8 for flags Jiri Slaby (SUSE)
2023-08-10 12:05 ` Mark Brown
2023-08-11 21:35 ` Max Staudt
2023-08-10 9:14 ` [PATCH 18/36] misc: ti-st: make st_recv() conforming to tty_ldisc_ops::receive_buf() Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 19/36] tty: make char_buf_ptr()/flag_buf_ptr()'s offset unsigned Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 20/36] tty: tty_buffer: make all offsets unsigned Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 21/36] tty: don't pass write() to do_tty_write() Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 22/36] tty: rename and de-inline do_tty_write() Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 23/36] tty: use min() in iterate_tty_write() Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 24/36] tty: use ssize_t for iterate_tty_read() returned type Jiri Slaby (SUSE)
2023-08-10 9:14 ` [PATCH 25/36] tty: switch size and count types in iterate_tty_read() to size_t Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 26/36] tty: use min() for size computation in iterate_tty_read() Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 27/36] tty: propagate u8 data to tty_operations::write() Jiri Slaby (SUSE)
2023-08-11 11:52 ` Alexander Gordeev
2023-08-17 10:42 ` Jiri Slaby
2023-08-14 14:47 ` Geert Uytterhoeven
2023-08-17 10:53 ` Alexander Gordeev
2023-08-10 9:15 ` [PATCH 28/36] tty: propagate u8 data to tty_operations::put_char() Jiri Slaby (SUSE)
2023-08-14 14:44 ` Geert Uytterhoeven
2023-08-17 10:55 ` Alexander Gordeev
2023-08-10 9:15 ` [PATCH 29/36] tty: make tty_operations::write()'s count size_t Jiri Slaby (SUSE)
2023-08-14 17:58 ` Geert Uytterhoeven
2023-08-10 9:15 ` [PATCH 30/36] tty: audit: unify to u8 Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 31/36] tty: ldops: " Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 32/36] tty: hvc: convert counts to size_t Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 33/36] tty: vcc: " Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 34/36] tty: gdm724x: " Jiri Slaby (SUSE)
2023-08-10 9:42 ` Dan Carpenter
2023-08-10 10:08 ` Jiri Slaby
2023-08-10 10:39 ` [PATCH 34-and-three-quarters/36] tty: gdm724x: simplify gdm_tty_write() Jiri Slaby (SUSE)
2023-08-11 9:11 ` Ilpo Järvinen
2023-08-15 17:22 ` [PATCH 34/36] tty: gdm724x: convert counts to size_t Nathan Chancellor
2023-08-16 6:46 ` Jiri Slaby
2023-08-16 8:40 ` David Laight
2023-08-16 8:58 ` Jiri Slaby
2023-08-16 9:18 ` David Laight
2023-08-10 9:15 ` [PATCH 35/36] tty: hso: simplify hso_serial_write() Jiri Slaby (SUSE)
2023-08-10 9:15 ` [PATCH 36/36] tty: rfcomm: convert counts to size_t Jiri Slaby (SUSE)
2023-08-11 10:26 ` [PATCH 00/36] tty: type unifications -- part I Ilpo Järvinen
2023-08-14 6:59 ` Jiri Slaby
2023-08-14 14:47 ` Ilpo Järvinen
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