x86 setup: sizeof() is unsigned, unbreak comparisons

We use signed values for limit checking since the values can go
negative under certain circumstances.  However, sizeof() is unsigned
and forces the comparison to be unsigned, so move the comparison into
the heap_free() macros so we can ensure it is a signed comparison.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/boot/video-vesa.c b/arch/x86/boot/video-vesa.c
index 192190710710..4716b9a96357 100644
--- a/arch/x86/boot/video-vesa.c
+++ b/arch/x86/boot/video-vesa.c
@@ -57,7 +57,7 @@ static int vesa_probe(void)
         while ((mode = rdfs16(mode_ptr)) != 0xffff) {
                 mode_ptr += 2;
 
-                if (heap_free() < sizeof(struct mode_info))
+                if (!heap_free(sizeof(struct mode_info)))
                         break;  /* Heap full, can't save mode info */
 
                 if (mode & ~0x1ff)