[PATCH 57/62] ARM: exynos: fix l2x0 saved regs handling

Arnd Bergmann
2014-03-19T19:29:54Z

The exynos4_l2x0_cache_init function tries to flush the data cache
for the location of the saved l2x0 registers and pass the physical
address to the s5p-sleep implementation.

However, the s5p-sleep code is optional, and if it is disabled,
we get a linker error here when the l2x0_regs_phys variable does
not exist.

To solve this, use a compile-time conditional to drop this code
if we don't want it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
---
arch/arm/mach-exynos/common.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 025fd82..b2f9bb0 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -404,8 +404,10 @@ static int __init exynos4_l2x0_cache_init(void)
if (ret)
return ret;

- l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
- clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
+ if (IS_ENABLED(CONFIG_S5P_SLEEP)) {
+ l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
+ clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
+ }
return 0;
}
early_initcall(exynos4_l2x0_cache_init);
--
1.8.3.2