--- zzzz-none-000/linux-2.6.19.2/arch/i386/kernel/alternative.c	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5505/linux-2.6.19.2/arch/i386/kernel/alternative.c	2007-01-19 14:42:56.000000000 +0000
@@ -3,6 +3,7 @@
 #include <linux/list.h>
 #include <asm/alternative.h>
 #include <asm/sections.h>
+#include <asm/desc.h>
 
 static int no_replacement    = 0;
 static int smp_alt_once      = 0;
@@ -142,6 +143,12 @@
 	u8 *instr;
 	int diff, i, k;
 
+#ifdef CONFIG_PAX_KERNEXEC
+	unsigned long cr0;
+
+	pax_open_kernel(cr0);
+#endif
+
 	DPRINTK("%s: alt table %p -> %p\n", __FUNCTION__, start, end);
 	for (a = start; a < end; a++) {
 		BUG_ON(a->replacementlen > a->instrlen);
@@ -156,16 +163,21 @@
 				__FUNCTION__, a->instr, instr);
 		}
 #endif
-		memcpy(instr, a->replacement, a->replacementlen);
+		memcpy(instr + __KERNEL_TEXT_OFFSET, a->replacement, a->replacementlen);
 		diff = a->instrlen - a->replacementlen;
 		/* Pad the rest with nops */
 		for (i = a->replacementlen; diff > 0; diff -= k, i += k) {
 			k = diff;
 			if (k > ASM_NOP_MAX)
 				k = ASM_NOP_MAX;
-			memcpy(a->instr + i, noptable[k], k);
+			memcpy(a->instr + i + __KERNEL_TEXT_OFFSET, noptable[k], k);
 		}
 	}
+
+#ifdef CONFIG_PAX_KERNEXEC
+	pax_close_kernel(cr0);
+#endif
+
 }
 
 #ifdef CONFIG_SMP
@@ -174,50 +186,96 @@
 {
 	struct alt_instr *a;
 
+#ifdef CONFIG_PAX_KERNEXEC
+	unsigned long cr0;
+
+	pax_open_kernel(cr0);
+#endif
+
 	DPRINTK("%s: alt table %p-%p\n", __FUNCTION__, start, end);
 	for (a = start; a < end; a++) {
 		memcpy(a->replacement + a->replacementlen,
-		       a->instr,
+		       a->instr + __KERNEL_TEXT_OFFSET,
 		       a->instrlen);
 	}
+
+#ifdef CONFIG_PAX_KERNEXEC
+	pax_close_kernel(cr0);
+#endif
+
 }
 
 static void alternatives_smp_apply(struct alt_instr *start, struct alt_instr *end)
 {
 	struct alt_instr *a;
 
+#ifdef CONFIG_PAX_KERNEXEC
+	unsigned long cr0;
+
+	pax_open_kernel(cr0);
+#endif
+
 	for (a = start; a < end; a++) {
-		memcpy(a->instr,
+		memcpy(a->instr + __KERNEL_TEXT_OFFSET,
 		       a->replacement + a->replacementlen,
 		       a->instrlen);
 	}
+
+#ifdef CONFIG_PAX_KERNEXEC
+	pax_close_kernel(cr0);
+#endif
+
 }
 
 static void alternatives_smp_lock(u8 **start, u8 **end, u8 *text, u8 *text_end)
 {
-	u8 **ptr;
+	u8 *ptr;
+
+#ifdef CONFIG_PAX_KERNEXEC
+	unsigned long cr0;
 
-	for (ptr = start; ptr < end; ptr++) {
-		if (*ptr < text)
+	pax_open_kernel(cr0);
+#endif
+
+	for (; start < end; start++) {
+		ptr = *start + __KERNEL_TEXT_OFFSET;
+		if (ptr < text)
 			continue;
-		if (*ptr > text_end)
+		if (ptr > text_end)
 			continue;
-		**ptr = 0xf0; /* lock prefix */
+		*ptr = 0xf0; /* lock prefix */
 	};
+
+#ifdef CONFIG_PAX_KERNEXEC
+	pax_close_kernel(cr0);
+#endif
+
 }
 
 static void alternatives_smp_unlock(u8 **start, u8 **end, u8 *text, u8 *text_end)
 {
 	unsigned char **noptable = find_nop_table();
-	u8 **ptr;
+	u8 *ptr;
+
+#ifdef CONFIG_PAX_KERNEXEC
+	unsigned long cr0;
+
+	pax_open_kernel(cr0);
+#endif
 
-	for (ptr = start; ptr < end; ptr++) {
-		if (*ptr < text)
+	for (; start < end; start++) {
+		ptr = *start + __KERNEL_TEXT_OFFSET;
+		if (ptr < text)
 			continue;
-		if (*ptr > text_end)
+		if (ptr > text_end)
 			continue;
-		**ptr = noptable[1][0];
+		*ptr = noptable[1][0];
 	};
+
+#ifdef CONFIG_PAX_KERNEXEC
+	pax_close_kernel(cr0);
+#endif
+
 }
 
 struct smp_alt_module {