Re: swsusp: Remove arch-specific references from generic code

[Rafael J. Wysocki]

Hi,

On Wednesday, 16 of March 2005 01:12, Pavel Machek wrote:
> Hi!
> 
> This is fix for "swsusp_restore crap"-: we had some i386-specific code
> referenced from generic code. This fixes it by inlining tlb_flush_all
> into assembly.
> 
> Please apply,

Unfortunately, this patch requires the following fix.  Without it, swsusp will
leak lots of memory on every resume.  Sorry for this bug, it was really dumb.

Rafael


Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>

diff -Nrup linux-2.6.12-rc1-a/arch/i386/power/swsusp.S linux-2.6.12-rc1-b/arch/i386/power/swsusp.S
--- linux-2.6.12-rc1-a/arch/i386/power/swsusp.S	2005-03-19 11:51:02.000000000 +0100
+++ linux-2.6.12-rc1-b/arch/i386/power/swsusp.S	2005-03-19 11:52:37.000000000 +0100
@@ -68,4 +68,6 @@ done:
 
 	pushl saved_context_eflags ; popfl
 
+	xorl	%eax, %eax
+
 	ret
diff -Nrup linux-2.6.12-rc1-a/arch/x86_64/kernel/suspend_asm.S linux-2.6.12-rc1-b/arch/x86_64/kernel/suspend_asm.S
--- linux-2.6.12-rc1-a/arch/x86_64/kernel/suspend_asm.S	2005-03-19 11:51:02.000000000 +0100
+++ linux-2.6.12-rc1-b/arch/x86_64/kernel/suspend_asm.S	2005-03-19 11:52:10.000000000 +0100
@@ -83,7 +83,7 @@ done:
 
 	movq saved_context_esp(%rip), %rsp
 	movq saved_context_ebp(%rip), %rbp
-	movq saved_context_eax(%rip), %rax
+	/* Don't restore %rax, it must be 0 */
 	movq saved_context_ebx(%rip), %rbx
 	movq saved_context_ecx(%rip), %rcx
 	movq saved_context_edx(%rip), %rdx
@@ -99,4 +99,6 @@ done:
 	movq saved_context_r15(%rip), %r15
 	pushq saved_context_eflags(%rip) ; popfq
 
+	xorq	%rax, %rax
+
 	ret

-- 
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
		-- Lewis Carroll "Alice's Adventures in Wonderland"
-
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