5.4-stable patches

added patches:
	powerpc-32-fix-boot-failure-with-gcc-latent-entropy-plugin.patch

diff --git a/queue-5.4/powerpc-32-fix-boot-failure-with-gcc-latent-entropy-plugin.patch b/queue-5.4/powerpc-32-fix-boot-failure-with-gcc-latent-entropy-plugin.patch
new file mode 100644 (file)
index 0000000..3794172
--- /dev/null
+++ b/queue-5.4/powerpc-32-fix-boot-failure-with-gcc-latent-entropy-plugin.patch
@@ -0,0 +1,54 @@
+From bba496656a73fc1d1330b49c7f82843836e9feb1 Mon Sep 17 00:00:00 2001
+From: Christophe Leroy <christophe.leroy@csgroup.eu>
+Date: Wed, 22 Dec 2021 13:07:31 +0000
+Subject: powerpc/32: Fix boot failure with GCC latent entropy plugin
+
+From: Christophe Leroy <christophe.leroy@csgroup.eu>
+
+commit bba496656a73fc1d1330b49c7f82843836e9feb1 upstream.
+
+Boot fails with GCC latent entropy plugin enabled.
+
+This is due to early boot functions trying to access 'latent_entropy'
+global data while the kernel is not relocated at its final
+destination yet.
+
+As there is no way to tell GCC to use PTRRELOC() to access it,
+disable latent entropy plugin in early_32.o and feature-fixups.o and
+code-patching.o
+
+Fixes: 38addce8b600 ("gcc-plugins: Add latent_entropy plugin")
+Cc: stable@vger.kernel.org # v4.9+
+Reported-by: Erhard Furtner <erhard_f@mailbox.org>
+Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+Link: https://bugzilla.kernel.org/show_bug.cgi?id=215217
+Link: https://lore.kernel.org/r/2bac55483b8daf5b1caa163a45fa5f9cdbe18be4.1640178426.git.christophe.leroy@csgroup.eu
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/powerpc/kernel/Makefile |    1 +
+ arch/powerpc/lib/Makefile    |    3 +++
+ 2 files changed, 4 insertions(+)
+
+--- a/arch/powerpc/kernel/Makefile
++++ b/arch/powerpc/kernel/Makefile
+@@ -13,6 +13,7 @@ CFLAGS_prom_init.o      += -fPIC
+ CFLAGS_btext.o                += -fPIC
+ endif
+ 
++CFLAGS_early_32.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
+ CFLAGS_cputable.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
+ CFLAGS_prom_init.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
+ CFLAGS_btext.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
+--- a/arch/powerpc/lib/Makefile
++++ b/arch/powerpc/lib/Makefile
+@@ -16,6 +16,9 @@ CFLAGS_code-patching.o += -DDISABLE_BRAN
+ CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
+ endif
+ 
++CFLAGS_code-patching.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
++CFLAGS_feature-fixups.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
++
+ obj-y += alloc.o code-patching.o feature-fixups.o pmem.o
+ 
+ ifndef CONFIG_KASAN

diff --git a/queue-5.4/series b/queue-5.4/series
index dbfca4207aecb45d3ac644d88ee2106597d1eb56..9103bbbbb810e22c54b4c3abe3a39a2b68f65355 100644 (file)
--- a/queue-5.4/series
+++ b/queue-5.4/series
@@ -21,3 +21,4 @@ usb-core-fix-hang-in-usb_kill_urb-by-adding-memory-barriers.patch
 usb-typec-tcpm-do-not-disconnect-while-receiving-vbus-off.patch
 ucsi_ccg-check-dev_int-bit-only-when-starting-ccg4.patch
 net-sfp-ignore-disabled-sfp-node.patch
+powerpc-32-fix-boot-failure-with-gcc-latent-entropy-plugin.patch