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sh: ratelimit unaligned fixups

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This patch makes sure we see messages about unaligned access fixups
every now and then. Else especially userspace apps suffering from
bad programming won't ever be noticed...

Signed-off by: Andre Draszik <andre.draszik@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Andre Draszik 2009-08-24 14:38:27 +09:00 committed by Paul Mundt
parent c3144fc46f
commit 9a4af027a0
1 changed files with 4 additions and 13 deletions
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17
arch/sh/kernel/traps_32.c
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@ -359,13 +359,6 @@ static inline int handle_delayslot(struct pt_regs *regs,
#define SH_PC_8BIT_OFFSET(instr) ((((signed char)(instr))*2) + 4)
#define SH_PC_12BIT_OFFSET(instr) ((((signed short)(instr<<4))>>3) + 4)
/*
* XXX: SH-2A needs this too, but it needs an overhaul thanks to mixed 32-bit
* opcodes..
*/
static int handle_unaligned_notify_count = 10;
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
struct mem_access *ma)
{
@ -375,15 +368,13 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
index = (instruction>>8)&15; /* 0x0F00 */
rm = regs->regs[index];
/* shout about the first ten userspace fixups */
if (user_mode(regs) && handle_unaligned_notify_count>0) {
handle_unaligned_notify_count--;
printk(KERN_NOTICE "Fixing up unaligned userspace access "
/* shout about fixups */
if (printk_ratelimit())
printk(KERN_NOTICE "Fixing up unaligned %s access "
"in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
user_mode(regs) ? "userspace" : "kernel",
current->comm, task_pid_nr(current),
(void *)regs->pc, instruction);
}
ret = -EFAULT;
switch (instruction&0xF000) {