From: Marc-André Lureau <marcandre.lur...@redhat.com>
This should be functionally equivalent, but slightly easier to read,
with simplified paths and checks at the end of the function.
The following patch is a major rewrite to get rid of the assert().
Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
dump/dump.c | 30 ++++++++++++------------------
1 file changed, 12 insertions(+), 18 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 4d9658ffa2..18f06cffe2 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1107,37 +1107,31 @@ static bool get_next_page(GuestPhysBlock **blockptr,
uint64_t *pfnptr,
uint8_t *buf;
/* block == NULL means the start of the iteration */
- if (!block) {
- block = QTAILQ_FIRST(&s->guest_phys_blocks.head);
- *blockptr = block;
- assert((block->target_start & ~target_page_mask) == 0);
- assert((block->target_end & ~target_page_mask) == 0);
- *pfnptr = dump_paddr_to_pfn(s, block->target_start);
- if (bufptr) {
- *bufptr = block->host_addr;
- }
- return true;
+ if (block == NULL) {
+ *blockptr = block = QTAILQ_FIRST(&s->guest_phys_blocks.head);
+ addr = block->target_start;
+ } else {
+ addr = dump_pfn_to_paddr(s, *pfnptr + 1);
}
-
- *pfnptr = *pfnptr + 1;
- addr = dump_pfn_to_paddr(s, *pfnptr);
+ assert(block != NULL);
if ((addr >= block->target_start) &&
(addr + s->dump_info.page_size <= block->target_end)) {
buf = block->host_addr + (addr - block->target_start);
} else {
/* the next page is in the next block */
- block = QTAILQ_NEXT(block, next);
- *blockptr = block;
+ *blockptr = block = QTAILQ_NEXT(block, next);
if (!block) {
return false;
}
- assert((block->target_start & ~target_page_mask) == 0);
- assert((block->target_end & ~target_page_mask) == 0);
- *pfnptr = dump_paddr_to_pfn(s, block->target_start);
+ addr = block->target_start;
buf = block->host_addr;
}
+ /* those checks are going away next */
+ assert((block->target_start & ~target_page_mask) == 0);
+ assert((block->target_end & ~target_page_mask) == 0);
+ *pfnptr = dump_paddr_to_pfn(s, addr);
if (bufptr) {
*bufptr = buf;
}
--
2.37.2
