[tip:x86/mm] x86: Emit "mem=nopentium ignored" warning when not supported

[tip-bot for Kamal Mostafa]

Commit-ID:  9a6d44b9adb777ca9549e88cd55bd8f2673c52a2
Gitweb:     http://git.kernel.org/tip/9a6d44b9adb777ca9549e88cd55bd8f2673c52a2
Author:     Kamal Mostafa <kamal@xxxxxxxxxxxxx>
AuthorDate: Thu, 3 Feb 2011 17:38:05 -0800
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 14 Feb 2011 13:15:43 +0100

x86: Emit "mem=nopentium ignored" warning when not supported

Emit warning when "mem=nopentium" is specified on any arch other
than x86_32 (the only that arch supports it).

Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
BugLink: http://bugs.launchpad.net/bugs/553464
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxx>
LKML-Reference: <1296783486-23033-2-git-send-email-kamal@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Cc: <stable@xxxxxxxxxx>
---
 arch/x86/kernel/e820.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 55a59d8..0b5e2b5 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -847,12 +847,15 @@ static int __init parse_memopt(char *p)
 	if (!p)
 		return -EINVAL;
 
-#ifdef CONFIG_X86_32
 	if (!strcmp(p, "nopentium")) {
+#ifdef CONFIG_X86_32
 		setup_clear_cpu_cap(X86_FEATURE_PSE);
 		return 0;
-	}
+#else
+		printk(KERN_WARNING "mem=nopentium ignored! (only supported on x86_32)\n");
+		return -EINVAL;
 #endif
+	}
 
 	userdef = 1;
 	mem_size = memparse(p, &p);
--
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