We don't compile with --param=min-pagesize=0, so GCC will complain about
dereference of (void *)0x9e0, even if done through a volatile pointer.
We know this to be okay, because either we run in PBL before MMU is set
up or we run in barebox proper and zero_page_access() will be
temporarily disabling trapping by the null page. Thus hide the access
from the compiler to silence the warning.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
arch/arm/mach-imx/romapi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/romapi.c b/arch/arm/mach-imx/romapi.c
index 0936c855fd03..b241e633ea01 100644
--- a/arch/arm/mach-imx/romapi.c
+++ b/arch/arm/mach-imx/romapi.c
@@ -57,10 +57,13 @@ int imx8mn_bootrom_load_image(void)
const u32 *imx8m_get_bootrom_log(void)
{
if (current_el() == 3) {
+ ulong *rom_log_addr_offset = (void *)0x9e0;
ulong rom_log_addr;
+ OPTIMIZER_HIDE_VAR(rom_log_addr_offset);
+
zero_page_access();
- rom_log_addr = readl(IOMEM(0x9e0));
+ rom_log_addr = *rom_log_addr_offset;
zero_page_faulting();
if (rom_log_addr < MX8M_OCRAM_BASE_ADDR ||
--
2.30.2
