1 files changed, 20 insertions, 40 deletions

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index f8e7005fede9..5570e7bb22bb 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -189,19 +189,18 @@ void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, un
 
         if (regs->tstate & TSTATE_PRIV) {
                 /* Test if this comes from uaccess places. */
-                unsigned long fixup;
-                unsigned long g2 = regs->u_regs[UREG_G2];
+                const struct exception_table_entry *entry;
 
-                if ((fixup = search_extables_range(regs->tpc, &g2))) {
-                        /* Ouch, somebody is trying ugly VM hole tricks on us... */
+                entry = search_exception_tables(regs->tpc);
+                if (entry) {
+                        /* Ouch, somebody is trying VM hole tricks on us... */
 #ifdef DEBUG_EXCEPTIONS
                         printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
-                        printk("EX_TABLE: insn<%016lx> fixup<%016lx> "
-                               "g2<%016lx>\n", regs->tpc, fixup, g2);
+                        printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
+                               regs->tpc, entry->fixup);
 #endif
-                        regs->tpc = fixup;
+                        regs->tpc = entry->fixup;
                         regs->tnpc = regs->tpc + 4;
-                        regs->u_regs[UREG_G2] = g2;
                         return;
                 }
                 /* Shit... */
@@ -758,26 +757,12 @@ void __init cheetah_ecache_flush_init(void)
         ecache_flush_size = (2 * largest_size);
         ecache_flush_linesize = smallest_linesize;
 
-        /* Discover a physically contiguous chunk of physical
-         * memory in 'sp_banks' of size ecache_flush_size calculated
-         * above.  Store the physical base of this area at
-         * ecache_flush_physbase.
-         */
-        for (node = 0; ; node++) {
-                if (sp_banks[node].num_bytes == 0)
-                        break;
-                if (sp_banks[node].num_bytes >= ecache_flush_size) {
-                        ecache_flush_physbase = sp_banks[node].base_addr;
-                        break;
-                }
-        }
+        ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
 
-        /* Note: Zero would be a valid value of ecache_flush_physbase so
-         * don't use that as the success test. :-)
-         */
-        if (sp_banks[node].num_bytes == 0) {
+        if (ecache_flush_physbase == ~0UL) {
                 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
-                            "contiguous physical memory.\n", ecache_flush_size);
+                            "contiguous physical memory.\n",
+                            ecache_flush_size);
                 prom_halt();
         }
 
@@ -1346,16 +1331,12 @@ static int cheetah_fix_ce(unsigned long physaddr)
 /* Return non-zero if PADDR is a valid physical memory address. */
 static int cheetah_check_main_memory(unsigned long paddr)
 {
-        int i;
+        unsigned long vaddr = PAGE_OFFSET + paddr;
 
-        for (i = 0; ; i++) {
-                if (sp_banks[i].num_bytes == 0)
-                        break;
-                if (paddr >= sp_banks[i].base_addr &&
-                    paddr < (sp_banks[i].base_addr + sp_banks[i].num_bytes))
-                        return 1;
-        }
-        return 0;
+        if (vaddr > (unsigned long) high_memory)
+                return 0;
+
+        return kern_addr_valid(vaddr);
 }
 
 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
@@ -1610,10 +1591,10 @@ void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned
                         /* OK, usermode access. */
                         recoverable = 1;
                 } else {
-                        unsigned long g2 = regs->u_regs[UREG_G2];
-                        unsigned long fixup = search_extables_range(regs->tpc, &g2);
+                        const struct exception_table_entry *entry;
 
-                        if (fixup != 0UL) {
+                        entry = search_exception_tables(regs->tpc);
+                        if (entry) {
                                 /* OK, kernel access to userspace. */
                                 recoverable = 1;
 
@@ -1632,9 +1613,8 @@ void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned
                                  * recoverable condition.
                                  */
                                 if (recoverable) {
-                                        regs->tpc = fixup;
+                                        regs->tpc = entry->fixup;
                                         regs->tnpc = regs->tpc + 4;
-                                        regs->u_regs[UREG_G2] = g2;
                                 }
                         }
                 }