48074d2615
A lot of the ColdFire internal peripherals (clocks, timers, interrupt
controllers, etc) are addressed using constants. The only problem with
that is they are not type clean when used with __raw_read/__raw_write
and read/write - they should be of type "void __iomem". This isn't
a problem currently because the IO access functions are local macros.
To switch to using the asm-generic implementations of these we need to
clean up the types. Otherwise you get warnings like this:
In file included from ./arch/m68k/include/asm/mcfsim.h:24:0,
from arch/m68k/coldfire/intc-simr.c:20:
arch/m68k/coldfire/intc-simr.c: In function ‘init_IRQ’:
./arch/m68k/include/asm/m520xsim.h:40:29: warning: passing argument 2 of ‘__raw_writeb’ makes pointer from integer without a cast [-Wint-conversion]
#define MCFINTC0_SIMR (MCFICM_INTC0 + MCFINTC_SIMR)
^
arch/m68k/coldfire/intc-simr.c:182:21: note: in expansion of macro ‘MCFINTC0_SIMR’
__raw_writeb(0xff, MCFINTC0_SIMR);
^
In file included from ./arch/m68k/include/asm/io_no.h:120:0,
from ./arch/m68k/include/asm/io.h:3,
from ./include/linux/io.h:25,
from ./include/linux/irq.h:25,
from ./include/asm-generic/hardirq.h:13,
from ./arch/m68k/include/asm/hardirq.h:25,
from ./include/linux/hardirq.h:9,
from ./include/linux/interrupt.h:13,
from arch/m68k/coldfire/intc-simr.c:16:
./include/asm-generic/io.h:71:22: note: expected ‘volatile void *’ but argument is of type ‘unsigned int’
#define __raw_writeb __raw_writeb
^
./include/asm-generic/io.h:72:20: note: in expansion of macro ‘__raw_writeb’
static inline void __raw_writeb(u8 value, volatile void __iomem *addr)
^
To start this clean up process introduce a macro, iomem(), that converts
a constant address to the correct "void __iomem *" type.
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Angelo Dureghello <angelo@sysam.it>
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README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.