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e31cf2f4ca
Patch series "mm: consolidate definitions of page table accessors", v2.
The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once. For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.
Most of these definitions are actually identical and typically it boils
down to, e.g.
static inline unsigned long pmd_index(unsigned long address)
{
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}
These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.
For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.
These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.
This patch (of 12):
The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g. pte_alloc() and
pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.
The include statements in such cases are remove with a simple loop:
for f in $(git grep -l "include <linux/mm.h>") ; do
sed -i -e '/include <asm\/pgtable.h>/ d' $f
done
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/*
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* linux/arch/m68k/atari/atasound.c
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*
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* ++Geert: Moved almost all stuff to linux/drivers/sound/
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*
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* The author of atari_nosound, atari_mksound and atari_microwire_cmd is
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* unknown. (++roman: That's me... :-)
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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* 1998-05-31 ++andreas: atari_mksound rewritten to always use the envelope,
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* no timer, atari_nosound removed.
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*
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*/
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/major.h>
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#include <linux/fcntl.h>
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <asm/atarihw.h>
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#include <asm/irq.h>
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#include <asm/atariints.h>
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/*
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* stuff from the old atasound.c
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*/
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void atari_microwire_cmd (int cmd)
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{
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tt_microwire.mask = 0x7ff;
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tt_microwire.data = MW_LM1992_ADDR | cmd;
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/* Busy wait for data being completely sent :-( */
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while( tt_microwire.mask != 0x7ff)
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;
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}
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EXPORT_SYMBOL(atari_microwire_cmd);
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/* PSG base frequency */
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#define PSG_FREQ 125000
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/* PSG envelope base frequency times 10 */
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#define PSG_ENV_FREQ_10 78125
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void atari_mksound (unsigned int hz, unsigned int ticks)
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{
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/* Generates sound of some frequency for some number of clock
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ticks. */
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unsigned long flags;
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unsigned char tmp;
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int period;
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local_irq_save(flags);
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/* Disable generator A in mixer control. */
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sound_ym.rd_data_reg_sel = 7;
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tmp = sound_ym.rd_data_reg_sel;
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tmp |= 011;
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sound_ym.wd_data = tmp;
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if (hz) {
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/* Convert from frequency value to PSG period value (base
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frequency 125 kHz). */
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period = PSG_FREQ / hz;
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if (period > 0xfff) period = 0xfff;
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/* Set generator A frequency to hz. */
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sound_ym.rd_data_reg_sel = 0;
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sound_ym.wd_data = period & 0xff;
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sound_ym.rd_data_reg_sel = 1;
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sound_ym.wd_data = (period >> 8) & 0xf;
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if (ticks) {
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/* Set length of envelope (max 8 sec). */
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int length = (ticks * PSG_ENV_FREQ_10) / HZ / 10;
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if (length > 0xffff) length = 0xffff;
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sound_ym.rd_data_reg_sel = 11;
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sound_ym.wd_data = length & 0xff;
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sound_ym.rd_data_reg_sel = 12;
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sound_ym.wd_data = length >> 8;
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/* Envelope form: max -> min single. */
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sound_ym.rd_data_reg_sel = 13;
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sound_ym.wd_data = 0;
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/* Use envelope for generator A. */
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sound_ym.rd_data_reg_sel = 8;
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sound_ym.wd_data = 0x10;
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} else {
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/* Set generator A level to maximum, no envelope. */
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sound_ym.rd_data_reg_sel = 8;
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sound_ym.wd_data = 15;
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}
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/* Turn on generator A in mixer control. */
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sound_ym.rd_data_reg_sel = 7;
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tmp &= ~1;
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sound_ym.wd_data = tmp;
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}
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local_irq_restore(flags);
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}
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