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x86 setup: sizeof() is unsigned, unbreak comparisons

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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>
This commit is contained in:
H. Peter Anvin
2007-10-25 16:09:38 -07:00
parent 6b6815c6d5
commit e6e1ace990
4 changed files with 5 additions and 5 deletions
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arch/x86/boot/video.c
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@ -371,7 +371,7 @@ static void save_screen(void)
saved.curx = boot_params.screen_info.orig_x;
saved.cury = boot_params.screen_info.orig_y;
if (heap_free() < saved.x*saved.y*sizeof(u16)+512)
if (!heap_free(saved.x*saved.y*sizeof(u16)+512))
return; /* Not enough heap to save the screen */
saved.data = GET_HEAP(u16, saved.x*saved.y);