[4.2.y-ckt stable] Patch "ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt5.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 27dadf9ae9bf068db8ee163c5637ff7aa3f62361 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony at atomide.com>
Date: Thu, 14 Jan 2016 12:20:48 -0800
Subject: ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata

commit 4da597d16602d14405b71a18d45e1c59f28f0fd2 upstream.

We don't want to write to .text so let's move ppa_zero_params and
ppa_por_params to .data and access them via pointers.

Note that I have not been able to test as we I don't have a HS
omap4 to test with. The code has been changed in similar way as
for omap3 though.

Cc: Kees Cook <keescook at chromium.org>
Cc: Laura Abbott <labbott at redhat.com>
Cc: Nishanth Menon <nm at ti.com>
Cc: Richard Woodruff <r-woodruff2 at ti.com>
Cc: Russell King <linux at arm.linux.org.uk>
Cc: Tero Kristo <t-kristo at ti.com>
Acked-by: Nicolas Pitre <nico at linaro.org>
Fixes: 1e6b48116a95 ("ARM: mm: allow non-text sections to be
non-executable")
Signed-off-by: Tony Lindgren <tony at atomide.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/arm/mach-omap2/sleep44xx.S | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S
index ad1bb94..5373a32 100644
--- a/arch/arm/mach-omap2/sleep44xx.S
+++ b/arch/arm/mach-omap2/sleep44xx.S
@@ -29,12 +29,6 @@
 	dsb
 .endm

-ppa_zero_params:
-	.word		0x0
-
-ppa_por_params:
-	.word		1, 0
-
 #ifdef CONFIG_ARCH_OMAP4

 /*
@@ -266,7 +260,9 @@ ENTRY(omap4_cpu_resume)
 	beq	skip_ns_smp_enable
 ppa_actrl_retry:
 	mov     r0, #OMAP4_PPA_CPU_ACTRL_SMP_INDEX
-	adr	r3, ppa_zero_params		@ Pointer to parameters
+	adr	r1, ppa_zero_params_offset
+	ldr	r3, [r1]
+	add	r3, r3, r1			@ Pointer to ppa_zero_params
 	mov	r1, #0x0			@ Process ID
 	mov	r2, #0x4			@ Flag
 	mov	r6, #0xff
@@ -303,7 +299,9 @@ skip_ns_smp_enable:
 	ldr     r0, =OMAP4_PPA_L2_POR_INDEX
 	ldr     r1, =OMAP44XX_SAR_RAM_BASE
 	ldr     r4, [r1, #L2X0_PREFETCH_CTRL_OFFSET]
-	adr     r3, ppa_por_params
+	adr     r1, ppa_por_params_offset
+	ldr	r3, [r1]
+	add	r3, r3, r1			@ Pointer to ppa_por_params
 	str     r4, [r3, #0x04]
 	mov	r1, #0x0			@ Process ID
 	mov	r2, #0x4			@ Flag
@@ -328,6 +326,8 @@ skip_l2en:
 #endif

 	b	cpu_resume			@ Jump to generic resume
+ppa_por_params_offset:
+	.long	ppa_por_params - .
 ENDPROC(omap4_cpu_resume)
 #endif	/* CONFIG_ARCH_OMAP4 */

@@ -382,4 +382,13 @@ ENTRY(omap_do_wfi)
 	nop

 	ldmfd	sp!, {pc}
+ppa_zero_params_offset:
+	.long	ppa_zero_params - .
 ENDPROC(omap_do_wfi)
+
+	.data
+ppa_zero_params:
+	.word		0
+
+ppa_por_params:
+	.word		1, 0
--
2.7.0