[hppa/parisc64-smp] Work around gcc 4.8 miscompilation (Closes: #762390)
svn path=/dists/sid/linux/; revision=21890
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linux (3.16.3-3) UNRELEASED; urgency=low
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[ Ian Campbell ]
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* [armhf] Add Exynos5 disk/usb/nic modules to udebs.
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[ Ben Hutchings ]
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* [hppa/parisc64-smp] Work around gcc 4.8 miscompilation (Closes: #762390)
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-- Ian Campbell <ijc@debian.org> Sun, 21 Sep 2014 12:09:24 +0100
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linux (3.16.3-2) unstable; urgency=medium
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From: Helge Deller <deller@gmx.de>
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Date: Sun, 21 Sep 2014 20:53:39 +0200
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Subject: hppa-arch-fast-indirect.patch
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Bug-Debian: https://bugs.debian.org/762390
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Currently the 64bit hppa kernel gets miscompiled by gcc-4.8 and as such
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it will not boot.
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The attached patch fixes one of the problems. Latest changes in gcc-4.8
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made changes to the -mfast-indirect-calls option which now produces wrong code
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when compiling for 64bit. The problem is being worked on in upstream gcc-4.8,
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and we don't know yet if we will implement -mfast-indirect-calls for 64bit
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(which might introduce side-effects) or not. That's the reason why I don't want
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to push attached patch upstream yet.
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--- a/arch/parisc/Makefile
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+++ b/arch/parisc/Makefile
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@@ -48,7 +48,12 @@ cflags-y := -pipe
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# These flags should be implied by an hppa-linux configuration, but they
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# are not in gcc 3.2.
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-cflags-y += -mno-space-regs -mfast-indirect-calls
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+cflags-y += -mno-space-regs
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+
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+# -mfast-indirect-calls is only relevant for 32-bit kernels.
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+ifndef CONFIG_64BIT
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+cflags-y += -mfast-indirect-calls
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+endif
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# Currently we save and restore fpregs on all kernel entry/interruption paths.
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# If that gets optimized, we might need to disable the use of fpregs in the
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@ -55,6 +55,7 @@ bugfix/mips/MIPS-ZBOOT-add-missing-linux-string.h-include.patch
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bugfix/x86/x86-reject-x32-executables-if-x32-abi-not-supported.patch
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bugfix/s390/s390-3215-fix-hanging-console-issue.patch
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bugfix/arm64/arm64-crypto-fix-makefile-rule-for-aes-glue-.o.patch
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bugfix/parisc/hppa-arch-fast-indirect.patch
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# Arch features
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features/mips/MIPS-Support-hard-limit-of-cpu-count-nr_cpu_ids.patch
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