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arc: get rid of private asm/unaligned.h

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Declarations local to arch/*/kernel/*.c are better off *not* in a public
header - arch/arc/kernel/unaligned.h is just fine for those
bits.

Unlike the parisc case, here we have an extra twist - asm/mmu.h
has an implicit dependency on struct pt_regs, and in some users
that used to be satisfied by include of asm/ptrace.h from
asm/unaligned.h (note that asm/mmu.h itself did _not_ pull asm/unaligned.h
- it relied upon the users having pulled asm/unaligned.h before asm/mmu.h
got there).

Seeing that asm/mmu.h only wants struct pt_regs * arguments in
an extern, just pre-declare it there - less brittle that way.

With that done _all_ asm/unaligned.h instances are reduced to include
of asm-generic/unaligned.h and can be removed - unaligned.h is in
mandatory-y in include/asm-generic/Kbuild.

What's more, we can move asm-generic/unaligned.h to linux/unaligned.h
and switch includes of <asm/unaligned.h> to <linux/unaligned.h>; that's
better off as an auto-generated commit, though, to be done by Linus
at -rc1 time next cycle.

Acked-by: Vineet Gupta <vgupta@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2023-12-05 21:53:22 -05:00
parent 134d988208
commit 00429083f4
5 changed files with 19 additions and 27 deletions
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1
arch/arc/include/asm/mmu.h
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@ -14,6 +14,7 @@ typedef struct {
unsigned long asid[NR_CPUS]; /* 8 bit MMU PID + Generation cycle */
} mm_context_t;
struct pt_regs;
extern void do_tlb_overlap_fault(unsigned long, unsigned long, struct pt_regs *);
#endif

27
arch/arc/include/asm/unaligned.h
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@ -1,27 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*/
#ifndef _ASM_ARC_UNALIGNED_H
#define _ASM_ARC_UNALIGNED_H
/* ARC700 can't handle unaligned Data accesses. */
#include <asm-generic/unaligned.h>
#include <asm/ptrace.h>
#ifdef CONFIG_ARC_EMUL_UNALIGNED
int misaligned_fixup(unsigned long address, struct pt_regs *regs,
struct callee_regs *cregs);
#else
static inline int
misaligned_fixup(unsigned long address, struct pt_regs *regs,
struct callee_regs *cregs)
{
/* Not fixed */
return 1;
}
#endif
#endif /* _ASM_ARC_UNALIGNED_H */

1
arch/arc/kernel/traps.c
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@ -20,6 +20,7 @@
#include <asm/setup.h>
#include <asm/unaligned.h>
#include <asm/kprobes.h>
#include "unaligned.h"
void die(const char *str, struct pt_regs *regs, unsigned long address)
{

1
arch/arc/kernel/unaligned.c
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@ -12,6 +12,7 @@
#include <linux/ptrace.h>
#include <linux/uaccess.h>
#include <asm/disasm.h>
#include "unaligned.h"
#ifdef CONFIG_CPU_BIG_ENDIAN
#define BE 1

16
arch/arc/kernel/unaligned.h Normal file
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@ -0,0 +1,16 @@
struct pt_regs;
struct callee_regs;
#ifdef CONFIG_ARC_EMUL_UNALIGNED
int misaligned_fixup(unsigned long address, struct pt_regs *regs,
struct callee_regs *cregs);
#else
static inline int
misaligned_fixup(unsigned long address, struct pt_regs *regs,
struct callee_regs *cregs)
{
/* Not fixed */
return 1;
}
#endif