void mutex_wait(mutex_t *mutex)
{
disable_ints();
enable_kernel_preempt();
enable_ints();
}
int
osi_VMDirty_p(struct vcache *avc)
{
int dirtyPages;
if (avc->execsOrWriters <= 0)
return 0; /* can't be many dirty pages here, I guess */
#if defined (AFS_AIX32_ENV)
#ifdef notdef
/* because of the level of hardware involvment with VM and all the
* warnings about "This routine must be called at VMM interrupt
* level", I thought it would be safest to disable interrupts while
* looking at the software page fault table. */
/* convert vm handle into index into array: I think that stoinio is
* always zero... Look into this XXX */
#define VMHASH(handle) ( \
( ((handle) & ~vmker.stoinio) \
^ ((((handle) & ~vmker.stoinio) & vmker.stoimask) << vmker.stoihash) \
) & 0x000fffff)
if (avc->segid) {
unsigned int pagef, pri, index, next;
index = VMHASH(avc->segid);
if (scb_valid(index)) { /* could almost be an ASSERT */
pri = disable_ints();
for (pagef = scb_sidlist(index); pagef >= 0; pagef = next) {
next = pft_sidfwd(pagef);
if (pft_modbit(pagef)) { /* has page frame been modified? */
enable_ints(pri);
return 1;
}
}
enable_ints(pri);
}
}
#undef VMHASH
#endif
#endif /* AFS_AIX32_ENV */
#if defined (AFS_SUN5_ENV)
if (avc->f.states & CMAPPED) {
struct page *pg;
for (pg = avc->v.v_s.v_Pages; pg; pg = pg->p_vpnext) {
if (pg->p_mod) {
return 1;
}
}
}
#endif
return 0;
}
