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* grub-core/kern/i386/tsc.c (calibrate_tsc): Ensure that

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no division by 0 occurs.
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Vladimir Serbinenko committed 2015-01-21 17:42:14 +01:00
1 parent e360b5d176
commit 2e62352bc2
2 files changed
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+5
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@@ -1,3 +1,8 @@
2015-01-20 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/i386/tsc.c (calibrate_tsc): Ensure that
no division by 0 occurs.
2015-01-20 Vladimir Serbinenko <phcoder@gmail.com>
* include/grub/misc.h (grub_div_roundup): Remove as it's unused.
grub-core/kern/i386/tsc.c
+4
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@@ -122,7 +122,11 @@ calibrate_tsc (void)
grub_pit_wait (0xffff);
end_tsc = grub_get_tsc ();
grub_tsc_rate = 0;
if (end_tsc > tsc_boot_time)
grub_tsc_rate = grub_divmod64 ((55ULL << 32), end_tsc - tsc_boot_time, 0);
if (grub_tsc_rate == 0)
grub_tsc_rate = 5368;/* 800 MHz */
}
#endif