From: Keir Fraser <keir.fraser@citrix.com>
Date: Tue, 21 Oct 2008 10:39:22 +0000 (+0100)
Subject: x86: Avoid dynamic memory allocation during AP startup.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14066^2~7
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=35bb5ffbddc9a1331ccdfb51c2129c4d9da4fcd6;p=xen.git

x86: Avoid dynamic memory allocation during AP startup.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 69218fd322..d7360ec29c 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -473,13 +473,6 @@ static void construct_percpu_idt(unsigned int cpu)
 {
 	unsigned char idt_load[10];
 
-	/* If IDT table exists since last hotplug, reuse it */
-	if (!idt_tables[cpu]) {
-		idt_tables[cpu] = xmalloc_array(idt_entry_t, IDT_ENTRIES);
-		memcpy(idt_tables[cpu], idt_table,
-				IDT_ENTRIES*sizeof(idt_entry_t));
-	}
-
 	*(unsigned short *)(&idt_load[0]) = (IDT_ENTRIES*sizeof(idt_entry_t))-1;
 	*(unsigned long  *)(&idt_load[2]) = (unsigned long)idt_tables[cpu];
 	__asm__ __volatile__ ( "lidt %0" : "=m" (idt_load) );
@@ -908,6 +901,12 @@ static int __devinit do_boot_cpu(int apicid, int cpu)
 	}
 #endif
 
+	if (!idt_tables[cpu]) {
+		idt_tables[cpu] = xmalloc_array(idt_entry_t, IDT_ENTRIES);
+		memcpy(idt_tables[cpu], idt_table,
+		       IDT_ENTRIES*sizeof(idt_entry_t));
+	}
+
 	/*
 	 * This grunge runs the startup process for
 	 * the targeted processor.