From: Niklas Schnelle <schnelle@linux.ibm.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Alan Stern" <stern@rowland.harvard.edu>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-pci@vger.kernel.org, "Arnd Bergmann" <arnd@kernel.org>
Subject: [PATCH v3 38/38] asm-generic/io.h: drop inb() etc for HAS_IOPORT=n
Date: Tue, 14 Mar 2023 13:12:16 +0100 [thread overview]
Message-ID: <20230314121216.413434-39-schnelle@linux.ibm.com> (raw)
In-Reply-To: <20230314121216.413434-1-schnelle@linux.ibm.com>
With all subsystems and drivers either declaring their dependence on
HAS_IOPORT or fencing I/O port specific code sections we can finally
make inb()/outb() and friends compile-time dependent on HAS_IOPORT as
suggested by Linus in the linked mail. The main benefit of this is that
on platforms such as s390 which have no meaningful way of implementing
inb()/outb() their use without the proper HAS_IOPORT dependency will
result in easy to catch and fix compile-time errors instead of compiling
code that can never work.
Link: https://lore.kernel.org/lkml/CAHk-=wg80je=K7madF4e7WrRNp37e3qh6y10Svhdc7O8SZ_-8g@mail.gmail.com/
Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
---
include/asm-generic/io.h | 60 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 4c44a29b5e8e..a13fe19b55a9 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -539,6 +539,7 @@ static inline void writesq(volatile void __iomem *addr, const void *buffer,
#if !defined(inb) && !defined(_inb)
#define _inb _inb
+#ifdef CONFIG_HAS_IOPORT
static inline u8 _inb(unsigned long addr)
{
u8 val;
@@ -548,10 +549,15 @@ static inline u8 _inb(unsigned long addr)
__io_par(val);
return val;
}
+#else
+u8 _inb(unsigned long addr)
+ __compiletime_error("inb()) requires CONFIG_HAS_IOPORT");
+#endif
#endif
#if !defined(inw) && !defined(_inw)
#define _inw _inw
+#ifdef CONFIG_HAS_IOPORT
static inline u16 _inw(unsigned long addr)
{
u16 val;
@@ -561,10 +567,15 @@ static inline u16 _inw(unsigned long addr)
__io_par(val);
return val;
}
+#else
+u16 _inw(unsigned long addr)
+ __compiletime_error("inw() requires CONFIG_HAS_IOPORT");
+#endif
#endif
#if !defined(inl) && !defined(_inl)
#define _inl _inl
+#ifdef CONFIG_HAS_IOPORT
static inline u32 _inl(unsigned long addr)
{
u32 val;
@@ -574,36 +585,55 @@ static inline u32 _inl(unsigned long addr)
__io_par(val);
return val;
}
+#else
+u32 _inl(unsigned long addr)
+ __compiletime_error("inl() requires CONFIG_HAS_IOPORT");
+#endif
#endif
#if !defined(outb) && !defined(_outb)
#define _outb _outb
+#ifdef CONFIG_HAS_IOPORT
static inline void _outb(u8 value, unsigned long addr)
{
__io_pbw();
__raw_writeb(value, PCI_IOBASE + addr);
__io_paw();
}
+#else
+void _outb(u8 value, unsigned long addr)
+ __compiletime_error("outb() requires CONFIG_HAS_IOPORT");
+#endif
#endif
#if !defined(outw) && !defined(_outw)
#define _outw _outw
+#ifdef CONFIG_HAS_IOPORT
static inline void _outw(u16 value, unsigned long addr)
{
__io_pbw();
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
__io_paw();
}
+#else
+void _outw(u16 value, unsigned long addr)
+ __compiletime_error("outw() requires CONFIG_HAS_IOPORT");
+#endif
#endif
#if !defined(outl) && !defined(_outl)
#define _outl _outl
+#ifdef CONFIG_HAS_IOPORT
static inline void _outl(u32 value, unsigned long addr)
{
__io_pbw();
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
__io_paw();
}
+#else
+void _outl(u32 value, unsigned long addr)
+ __compiletime_error("outl() requires CONFIG_HAS_IOPORT");
+#endif
#endif
#include <linux/logic_pio.h>
@@ -687,53 +717,83 @@ static inline void outl_p(u32 value, unsigned long addr)
#ifndef insb
#define insb insb
+#ifdef CONFIG_HAS_IOPORT
static inline void insb(unsigned long addr, void *buffer, unsigned int count)
{
readsb(PCI_IOBASE + addr, buffer, count);
}
+#else
+void insb(unsigned long addr, void *buffer, unsigned int count)
+ __compiletime_error("insb() requires HAS_IOPORT");
+#endif
#endif
#ifndef insw
#define insw insw
+#ifdef CONFIG_HAS_IOPORT
static inline void insw(unsigned long addr, void *buffer, unsigned int count)
{
readsw(PCI_IOBASE + addr, buffer, count);
}
+#else
+void insw(unsigned long addr, void *buffer, unsigned int count)
+ __compiletime_error("insw() requires HAS_IOPORT");
+#endif
#endif
#ifndef insl
#define insl insl
+#ifdef CONFIG_HAS_IOPORT
static inline void insl(unsigned long addr, void *buffer, unsigned int count)
{
readsl(PCI_IOBASE + addr, buffer, count);
}
+#else
+void insl(unsigned long addr, void *buffer, unsigned int count)
+ __compiletime_error("insl() requires HAS_IOPORT");
+#endif
#endif
#ifndef outsb
#define outsb outsb
+#ifdef CONFIG_HAS_IOPORT
static inline void outsb(unsigned long addr, const void *buffer,
unsigned int count)
{
writesb(PCI_IOBASE + addr, buffer, count);
}
+#else
+void outsb(unsigned long addr, const void *buffer, unsigned int count)
+ __compiletime_error("outsb() requires HAS_IOPORT");
+#endif
#endif
#ifndef outsw
#define outsw outsw
+#ifdef CONFIG_HAS_IOPORT
static inline void outsw(unsigned long addr, const void *buffer,
unsigned int count)
{
writesw(PCI_IOBASE + addr, buffer, count);
}
+#else
+void outsw(unsigned long addr, const void *buffer, unsigned int count)
+ __compiletime_error("outsw() requires HAS_IOPORT");
+#endif
#endif
#ifndef outsl
#define outsl outsl
+#ifdef CONFIG_HAS_IOPORT
static inline void outsl(unsigned long addr, const void *buffer,
unsigned int count)
{
writesl(PCI_IOBASE + addr, buffer, count);
}
+#else
+void outsl(unsigned long addr, const void *buffer, unsigned int count)
+ __compiletime_error("outsl() requires HAS_IOPORT");
+#endif
#endif
#ifndef insb_p
--
2.37.2
next prev parent reply other threads:[~2023-03-14 12:16 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-14 12:11 [PATCH v3 00/38] Kconfig: Introduce HAS_IOPORT config option Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 01/38] Kconfig: introduce HAS_IOPORT option and select it as necessary Niklas Schnelle
2023-03-14 12:37 ` Johannes Berg
2023-03-23 13:23 ` Niklas Schnelle
2023-03-14 12:48 ` Geert Uytterhoeven
2023-03-14 13:29 ` Arnd Bergmann
2023-03-14 16:11 ` Niklas Schnelle
2023-03-14 16:37 ` Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 02/38] ata: add HAS_IOPORT dependencies Niklas Schnelle
2023-03-15 1:23 ` Damien Le Moal
2023-03-15 6:46 ` Arnd Bergmann
2023-03-15 7:15 ` Damien Le Moal
2023-03-15 7:15 ` Damien Le Moal
2023-03-15 8:39 ` Geert Uytterhoeven
2023-03-15 9:12 ` Damien Le Moal
2023-03-15 11:36 ` Geert Uytterhoeven
2023-03-15 23:57 ` Damien Le Moal
2023-03-16 15:21 ` Arnd Bergmann
2023-04-28 13:32 ` Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 03/38] char: impi, tpm: depend on HAS_IOPORT Niklas Schnelle
2023-03-14 12:20 ` Jarkko Sakkinen
2023-03-14 14:01 ` Arnd Bergmann
2023-03-14 13:52 ` Corey Minyard
2023-03-14 14:17 ` Geert Uytterhoeven
2023-03-14 15:08 ` Arnd Bergmann
2023-03-21 14:33 ` Jason Gunthorpe
2023-03-14 12:11 ` [PATCH v3 04/38] comedi: add HAS_IOPORT dependencies Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 05/38] counter: " Niklas Schnelle
2023-03-14 12:41 ` William Breathitt Gray
2023-04-28 13:27 ` Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 06/38] /dev/port: don't compile file operations without CONFIG_DEVPORT Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 07/38] drm: handle HAS_IOPORT dependencies Niklas Schnelle
2023-03-15 11:54 ` Jani Nikula
2023-03-23 15:05 ` Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 08/38] firmware: dmi-sysfs: handle HAS_IOPORT=n Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 09/38] gpio: add HAS_IOPORT dependencies Niklas Schnelle
2023-03-15 8:42 ` Linus Walleij
2023-04-28 14:41 ` Niklas Schnelle
2023-05-01 12:29 ` Linus Walleij
2023-03-14 12:11 ` [PATCH v3 10/38] hwmon: " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 11/38] i2c: " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 12/38] iio: ad7606: Kconfig: " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 13/38] Input: " Niklas Schnelle
2023-03-15 8:22 ` Geert Uytterhoeven
2023-04-28 14:50 ` Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 14/38] Input: gameport: add ISA and " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 15/38] leds: add " Niklas Schnelle
2023-03-16 16:14 ` Lee Jones
2023-03-23 12:42 ` Niklas Schnelle
2023-03-23 13:32 ` Arnd Bergmann
2023-03-23 14:02 ` Niklas Schnelle
2023-03-23 14:05 ` Arnd Bergmann
2023-03-23 16:11 ` Geert Uytterhoeven
2023-03-23 16:25 ` Arnd Bergmann
2023-03-23 14:53 ` Lee Jones
2023-03-23 15:33 ` Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 16/38] media: " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 17/38] misc: " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 18/38] mISDN: " Niklas Schnelle
2023-03-15 5:41 ` Jakub Kicinski
2023-03-14 12:11 ` [PATCH v3 19/38] mpt fusion: " Niklas Schnelle
2023-03-14 12:11 ` [PATCH v3 20/38] net: handle " Niklas Schnelle
2023-03-15 5:41 ` Jakub Kicinski
2023-03-15 9:47 ` Maciej W. Rozycki
2023-03-14 12:11 ` [PATCH v3 21/38] parport: PC style parport depends on HAS_IOPORT Niklas Schnelle
2023-03-14 14:12 ` Arnd Bergmann
2023-05-02 13:40 ` Niklas Schnelle
2023-05-02 15:30 ` Bjorn Helgaas
2023-03-14 12:12 ` [PATCH v3 22/38] PCI: Make quirk using inw() depend " Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 23/38] PCI/sysfs: Make I/O resource " Niklas Schnelle
2023-03-14 16:05 ` Bjorn Helgaas
2023-03-14 12:12 ` [PATCH v3 24/38] pcmcia: add HAS_IOPORT dependencies Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 25/38] platform: " Niklas Schnelle
2023-03-15 2:21 ` Tzung-Bi Shih
2023-03-14 12:12 ` [PATCH v3 26/38] pnp: " Niklas Schnelle
2023-03-20 17:37 ` Rafael J. Wysocki
2023-03-21 13:56 ` Rafael J. Wysocki
2023-03-23 12:55 ` Niklas Schnelle
2023-03-24 18:45 ` Wysocki, Rafael J
2023-03-14 12:12 ` [PATCH v3 27/38] power: " Niklas Schnelle
2023-03-29 23:01 ` Sebastian Reichel
2023-03-14 12:12 ` [PATCH v3 28/38] rtc: " Niklas Schnelle
2023-03-14 12:52 ` Alexandre Belloni
2023-05-08 15:36 ` Niklas Schnelle
2023-05-08 20:01 ` Arnd Bergmann
2023-05-09 6:38 ` Geert Uytterhoeven
2023-05-09 8:22 ` Arnd Bergmann
2023-05-09 8:51 ` Geert Uytterhoeven
2023-05-09 9:46 ` Arnd Bergmann
2023-03-14 12:12 ` [PATCH v3 29/38] scsi: " Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 30/38] sound: " Niklas Schnelle
2023-03-14 12:33 ` Takashi Iwai
2023-05-08 16:41 ` Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 31/38] speakup: add HAS_IOPORT dependency for SPEAKUP_SERIALIO Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 32/38] staging: add HAS_IOPORT dependencies Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 33/38] tty: serial: handle " Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 34/38] usb: " Niklas Schnelle
2023-03-14 14:56 ` Arnd Bergmann
2023-03-14 12:12 ` [PATCH v3 35/38] video: " Niklas Schnelle
2023-03-15 8:16 ` Geert Uytterhoeven
2023-03-15 10:19 ` Ville Syrjälä
2023-03-23 14:17 ` Niklas Schnelle
2023-03-23 16:08 ` Ville Syrjälä
2023-05-08 17:09 ` Niklas Schnelle
2023-03-14 12:12 ` [PATCH v3 36/38] watchdog: add " Niklas Schnelle
2023-03-14 14:21 ` Guenter Roeck
2023-03-14 12:12 ` [PATCH v3 37/38] wireless: " Niklas Schnelle
2023-03-15 5:26 ` Kalle Valo
2023-03-14 12:12 ` Niklas Schnelle [this message]
2023-03-14 14:05 ` [PATCH v3 00/38] Kconfig: Introduce HAS_IOPORT config option Arnd Bergmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230314121216.413434-39-schnelle@linux.ibm.com \
--to=schnelle@linux.ibm.com \
--cc=aou@eecs.berkeley.edu \
--cc=arnd@arndb.de \
--cc=arnd@kernel.org \
--cc=bhelgaas@google.com \
--cc=geert@linux-m68k.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=palmer@dabbelt.com \
--cc=paul.walmsley@sifive.com \
--cc=rafael@kernel.org \
--cc=stern@rowland.harvard.edu \
--cc=u.kleine-koenig@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).