[PATCH] arm: omap4: Fix omap_barriers_init for generic ioremap changes

Tony Lindgren
2012-01-12T18:42:57Z

Commit 73829af71fdb8655e7ba4b5a2a6612ad34a75a11
(Merge branch 'vmalloc' of git://git.linaro.org/people/nico/linux
into devel-stable) merged generic ioremap changes.

Commit 137d105d50f6e6c373c1aa759f59045e6239cf66
(ARM: OMAP4: Fix errata i688 with MPU interconnect barriers)
added a workaround for omap4.

In order for the errata to work, we now need the following
patch or else we'll get:

kernel BUG at mm/vmalloc.c:1134!

Signed-off-by: Tony Lindgren <tony@atomide.com>

--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -132,6 +132,7 @@ void omap3_map_io(void);
void am33xx_map_io(void);
void omap4_map_io(void);
void ti81xx_map_io(void);
+int omap_barriers_init(void);

/**
* omap_test_timeout - busy-loop, testing a condition
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -306,7 +306,12 @@ void __init omapam33xx_map_common_io(void)
#ifdef CONFIG_ARCH_OMAP4
void __init omap44xx_map_common_io(void)
{
+ int res;
+
iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
+ res = omap_barriers_init();
+ if (res)
+ pr_err("Barriers broken\n");
}
#endif

--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -51,7 +51,7 @@ void omap_bus_sync(void)
}
}

-static int __init omap_barriers_init(void)
+int __init omap_barriers_init(void)
{
struct map_desc dram_io_desc[1];
phys_addr_t paddr;
@@ -81,7 +81,11 @@ static int __init omap_barriers_init(void)

return 0;
}
-core_initcall(omap_barriers_init);
+#else
+int __init omap_barriers_init(void)
+{
+ return 0;
+}
#endif

void __init gic_init_irq(void)