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parisc: provide macro to create exception table entries

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Provide a macro ASM_EXCEPTIONTABLE_ENTRY() to create exception table
entries and convert all open-coded places to use that macro.

This patch is a first step toward creating a exception table which only
holds 32bit pointers even on a 64bit kernel. That way in my own kernel
I was able to reduce the in-kernel exception table from 44kB to 22kB.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller
2013-10-13 21:11:30 +02:00
parent 5e01dc7b26
commit 61dbbaeb86
5 changed files with 27 additions and 14 deletions
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6
arch/parisc/mm/fault.c
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@@ -142,6 +142,12 @@ int fixup_exception(struct pt_regs *regs)
{
const struct exception_table_entry *fix;
/* If we only stored 32bit addresses in the exception table we can drop
* out if we faulted on a 64bit address. */
if ((sizeof(regs->iaoq[0]) > sizeof(fix->insn))
&& (regs->iaoq[0] >> 32))
return 0;
fix = search_exception_tables(regs->iaoq[0]);
if (fix) {
struct exception_data *d;