Print a more sensible message about the minimum physical memory
requirement.
Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 549ecf3..f7af5e6 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -61,18 +61,26 @@ void __init setup_physmem(unsigned long start, unsigned
long reserve_end,
unsigned long len, unsigned long long highmem)
{
unsigned long reserve = reserve_end - start;
- int pfn = PFN_UP(__pa(reserve_end));
- int delta = (len - reserve) >> PAGE_SHIFT;
- int err, offset, bootmap_size;
+ unsigned long pfn = PFN_UP(__pa(reserve_end));
+ unsigned long delta = (len - reserve) >> PAGE_SHIFT;
+ unsigned long offset, bootmap_size;
+ int err, map_size;
+
+ offset = uml_reserved - uml_physmem;
+ map_size = len - offset;
+ if(map_size <= 0) {
+ printf("Too few physical memory! Needed=%d, given=%d\n",
+ offset, len);
+ exit(1);
+ }
physmem_fd = create_mem_file(len + highmem);
- offset = uml_reserved - uml_physmem;
err = os_map_memory((void *) uml_reserved, physmem_fd, offset,
- len - offset, 1, 1, 1);
+ map_size, 1, 1, 1);
if (err < 0) {
printf("setup_physmem - mapping %ld bytes of memory at 0x%p "
- "failed - errno = %d\n", len - offset,
+ "failed - errno = %d\n", map_size,
(void *) uml_reserved, err);
exit(1);
}
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