linux-kernel - [PATCH 55/85] x86: remove magic number from ACPI sleep stack buffer

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Date:	Sat, 11 Oct 2008 02:36:15 -0400
From:	Len Brown <lenb@...nel.org>
To:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Matt Mackall <mpm@...enic.com>, Len Brown <len.brown@...el.com>
Subject: [PATCH 55/85] x86: remove magic number from ACPI sleep stack buffer

From: Matt Mackall <mpm@...enic.com>

x86_64 SMP suspend to RAM uses a 10k temporary stack for saving the
kernel state, but only 4k of it is used. Shrink it to 4k.

Signed-off-by: Matt Mackall <mpm@...enic.com>
Acked-by: Pavel Machek <pavel@...e.cz>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 arch/x86/kernel/acpi/sleep.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 426e5d9..29cf340 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -97,7 +97,7 @@ int acpi_save_state_mem(void)
 #else /* CONFIG_64BIT */
 	header->trampoline_segment = setup_trampoline() >> 4;
 #ifdef CONFIG_SMP
-	stack_start.sp = temp_stack + 4096;
+	stack_start.sp = temp_stack + sizeof(temp_stack);
 #endif
 	initial_code = (unsigned long)wakeup_long64;
 	saved_magic = 0x123456789abcdef0;
-- 
1.5.5.1

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