kernel: vm_physseg: Fix allocation issue

We should check free_count before possibly resetting it. We don't want
horrible things to happen.

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/sys/vm/vm_physseg.c b/sys/vm/vm_physseg.c
index d9abc4b..1675649 100644
--- a/sys/vm/vm_physseg.c
+++ b/sys/vm/vm_physseg.c
@@ -184,6 +184,11 @@ vm_alloc_pageframe_internal(size_t count)
     uintptr_t frame_idx = 0;    /* The base index of first free frame */
 
     for (size_t i = last_used_idx; i < bitmap_size*8; ++i) {
+        if (free_count == count) {
+            can_alloc = true;
+            break;
+        }
+
         is_free = !bitmap_test_bit(bitmap, i);
 
         if (!is_free) {
@@ -191,11 +196,6 @@ vm_alloc_pageframe_internal(size_t count)
             continue;
         }
 
-        if (free_count == count) {
-            can_alloc = true;
-            break;
-        }
-
         /* Assume free here */
         if (frame_idx == 0)
             frame_idx = i;