[PATCH] ARM: xip: Fix module loading

Chris Brandt chris.brandt at renesas.com
Wed Nov 11 06:31:09 PST 2015

For an XIP kernel, RAM start at _sdata instead of _stext. This fixes an
issue where when you load a module, vmalloc would return virtual memory
that the MMU has incorrectly mapped to non-RAM physical addresses.
This fix is similar to what is already done in arm_memblock_init().

Signed-off-by: Chris Brandt <chris.brandt at renesas.com>
 arch/arm/mm/mmu.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index dd5a56b..d60cb8c 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1383,7 +1383,11 @@ static void __init kmap_init(void)
 static void __init map_lowmem(void)
 	struct memblock_region *reg;
+	phys_addr_t kernel_x_start = round_down(__pa(_sdata), SECTION_SIZE);
 	phys_addr_t kernel_x_start = round_down(__pa(_stext), SECTION_SIZE);
 	phys_addr_t kernel_x_end = round_up(__pa(__init_end), SECTION_SIZE);
 	/* Map all the lowmem memory banks. */

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