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WSL2-Linux-Kernel
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sh: Only shout about fixing up unexpected unaligned accesses 

Some unaligned accesses are completely expected. For example, the
trapped_io code uses the unaligned access fixup code path so there's no
need to warn about having to fixup the unaligned access.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Matt Fleming 2009-08-28 21:37:20 +00:00 коммит произвёл Paul Mundt
Родитель e79d57479c
Коммит 4aa5ac4ef4
3 изменённых файлов: 8 добавлений и 6 удалений
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2
arch/sh/include/asm/system_32.h
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@ -199,7 +199,7 @@ do { \
#endif #endif
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs, int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
struct mem_access *ma); struct mem_access *ma, int);
asmlinkage void do_address_error(struct pt_regs *regs, asmlinkage void do_address_error(struct pt_regs *regs,
unsigned long writeaccess, unsigned long writeaccess,

3
arch/sh/kernel/io_trapped.c
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@ -284,7 +284,8 @@ int handle_trapped_io(struct pt_regs *regs, unsigned long address)
return 0; return 0;
} }
tmp = handle_unaligned_access(instruction, regs, &trapped_io_access); tmp = handle_unaligned_access(instruction, regs,
&trapped_io_access, 1);
set_fs(oldfs); set_fs(oldfs);
return tmp == 0; return tmp == 0;
} }

9
arch/sh/kernel/traps_32.c
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@ -449,7 +449,7 @@ static inline int handle_delayslot(struct pt_regs *regs,
#define SH_PC_12BIT_OFFSET(instr) ((((signed short)(instr<<4))>>3) + 4) #define SH_PC_12BIT_OFFSET(instr) ((((signed short)(instr<<4))>>3) + 4)
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs, int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
struct mem_access *ma) struct mem_access *ma, int expected)
{ {
u_int rm; u_int rm;
int ret, index; int ret, index;
@ -458,7 +458,7 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
rm = regs->regs[index]; rm = regs->regs[index];
/* shout about fixups */ /* shout about fixups */
if (printk_ratelimit()) if (!expected && printk_ratelimit())
printk(KERN_NOTICE "Fixing up unaligned %s access " printk(KERN_NOTICE "Fixing up unaligned %s access "
"in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n", "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
user_mode(regs) ? "userspace" : "kernel", user_mode(regs) ? "userspace" : "kernel",
@ -657,7 +657,7 @@ fixup:
set_fs(USER_DS); set_fs(USER_DS);
tmp = handle_unaligned_access(instruction, regs, tmp = handle_unaligned_access(instruction, regs,
&user_mem_access); &user_mem_access, 0);
set_fs(oldfs); set_fs(oldfs);
if (tmp==0) if (tmp==0)
@ -694,7 +694,8 @@ uspace_segv:
die("insn faulting in do_address_error", regs, 0); die("insn faulting in do_address_error", regs, 0);
} }
handle_unaligned_access(instruction, regs, &user_mem_access); handle_unaligned_access(instruction, regs,
&user_mem_access, 0);
set_fs(oldfs); set_fs(oldfs);
} }
} }