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[PATCH] powerpc: Add a is_kernel_addr() macro

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There's a bunch of code that compares an address with KERNELBASE to see if
it's a "kernel address", ie. >= KERNELBASE. The proper test is actually to
compare with PAGE_OFFSET, since we're going to change KERNELBASE soon.

So replace all of them with an is_kernel_addr() macro that does that.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman
2005-12-04 18:39:15 +11:00
committed by Paul Mackerras
parent cd0ca2ce4b
commit 51fae6de24
9 changed files with 20 additions and 15 deletions
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6
arch/powerpc/mm/stab.c
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@ -122,7 +122,7 @@ static int __ste_allocate(unsigned long ea, struct mm_struct *mm)
unsigned long offset;
/* Kernel or user address? */
if (ea >= KERNELBASE) {
if (is_kernel_addr(ea)) {
vsid = get_kernel_vsid(ea);
} else {
if ((ea >= TASK_SIZE_USER64) || (! mm))
@ -133,7 +133,7 @@ static int __ste_allocate(unsigned long ea, struct mm_struct *mm)
stab_entry = make_ste(get_paca()->stab_addr, GET_ESID(ea), vsid);
if (ea < KERNELBASE) {
if (!is_kernel_addr(ea)) {
offset = __get_cpu_var(stab_cache_ptr);
if (offset < NR_STAB_CACHE_ENTRIES)
__get_cpu_var(stab_cache[offset++]) = stab_entry;
@ -190,7 +190,7 @@ void switch_stab(struct task_struct *tsk, struct mm_struct *mm)
entry++, ste++) {
unsigned long ea;
ea = ste->esid_data & ESID_MASK;
if (ea < KERNELBASE) {
if (!is_kernel_addr(ea)) {
ste->esid_data = 0;
}
}