[Patch 2/5] xbox: disable optimization for kernel decompressor

[Patch 2/5] xbox: disable optimization for kernel decompressor

[Ed Schouten]

When using the kernel decompressor on a Microsoft Xbox, the system hangs
because of invalid paging requests. When compiling the decompressor with
-O0, we can safely avoid this problem.

You can also download this patch at:
http://linux.g-rave.nl/patches/patch-xbox-optimization.diff
---

 Makefile |    7 +++++++
 1 files changed, 7 insertions(+)

diff -u -r --new-file linux-2.6.9-rc3/arch/i386/boot/compressed/Makefile
linux-2.6.9-rc3-ed0/arch/i386/boot/compressed/Makefile
--- linux-2.6.9-rc3/arch/i386/boot/compressed/Makefile	2004-09-30
05:05:20.000000000 +0200
+++ linux-2.6.9-rc3-ed0/arch/i386/boot/compressed/Makefile	2004-10-09
19:38:25.084610000 +0200
@@ -7,6 +7,13 @@
 targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
 EXTRA_AFLAGS	:= -traditional

+# Microsoft Xbox workaround:
+# Xbox v1.1+ crashes while decompressing the kernel when paging is off.
+# By disabling optimization we can fix this.
+ifeq ($(CONFIG_X86_XBOX),y)
+	CFLAGS_misc.o  := -O0
+endif
+
 LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup_32

 $(obj)/vmlinux: $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE

Re: [Patch 2/5] xbox: disable optimization for kernel decompressor

[Pavel Machek]

Hi!

> When using the kernel decompressor on a Microsoft Xbox, the system hangs
> because of invalid paging requests. When compiling the decompressor with
> -O0, we can safely avoid this problem.

This is probably workaround, not a real bugfix, right? Fix gcc, or
find out what is really wrong and put it in the comment...
								Pavel

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