Patch "arm64: build vdso without libgcov" has been added to the 3.18-stable tree

Patch "arm64: build vdso without libgcov" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    arm64: build vdso without libgcov

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm64-build-vdso-without-libgcov.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 543097843ca7c9ac3758d0b5879ea2a6f44089de Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 12 Nov 2015 15:37:12 +0100
Subject: arm64: build vdso without libgcov

From: Arnd Bergmann <arnd@arndb.de>

commit 543097843ca7c9ac3758d0b5879ea2a6f44089de upstream.

On a cross-toolchain without glibc support, libgcov may not be
available, and attempting to build an arm64 kernel with GCOV
enabled then results in a build error:

/home/arnd/cross-gcc/lib/gcc/aarch64-linux/5.2.1/../../../../aarch64-linux/bin/ld: cannot find -lgcov

We don't really want to link libgcov into the vdso anyway, so
this patch just disables GCOV in the vdso directory, just as
we do for most other architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm64/kernel/vdso/Makefile |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -15,6 +15,9 @@ ccflags-y := -shared -fno-common -fno-bu
 ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
 		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
 
+# Disable gcov profiling for VDSO code
+GCOV_PROFILE := n
+
 # Workaround for bare-metal (ELF) toolchains that neglect to pass -shared
 # down to collect2, resulting in silent corruption of the vDSO image.
 ccflags-y += -Wl,-shared


Patches currently in stable-queue which might be from arnd@arndb.de are

queue-3.18/ib-iser-fix-sparse-warnings.patch
queue-3.18/cred-userns-define-current_user_ns-as-a-function.patch
queue-3.18/pci-xilinx-fix-harmless-format-string-warning.patch
queue-3.18/arm64-build-vdso-without-libgcov.patch
queue-3.18/arm64-provide-a-namespace-to-ncaps.patch
queue-3.18/alsa-ppc-awacs-shut-up-maybe-uninitialized-warning.patch
queue-3.18/net-tg3-avoid-uninitialized-variable-warning.patch
queue-3.18/tty-isicom-fix-big-endian-compile-warning.patch
queue-3.18/mtd-avoid-stack-overflow-in-mtd-cfi-code.patch
queue-3.18/ib-qib-rename-bits_per_page-to-rvt_bits_per_page.patch
queue-3.18/ips-remove-pointless-warning.patch
queue-3.18/powerpc-ptrace-fix-out-of-bounds-array-access-warning.patch
queue-3.18/staging-imx-drm-fix-indentation-warning.patch
queue-3.18/mlx5-avoid-build-warnings-on-32-bit.patch
queue-3.18/mm-cma-silence-warnings-due-to-max-usage.patch
queue-3.18/misdn-avoid-arch-specific-__builtin_return_address-call.patch
queue-3.18/staging-bcm-add-32-bit-host-dependency.patch
queue-3.18/staging-vt6655-fix-overly-large-stack-usage.patch
queue-3.18/drbd-avoid-redefinition-of-bits_per_page.patch
queue-3.18/infiniband-mlx5-avoid-a-compile-time-warning.patch
queue-3.18/arm-cns3xxx-shut-up-frame-size-warning.patch
queue-3.18/ib-ehca-fix-maybe-uninitialized-warnings.patch