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MIPS: Octeon: Workaround link failures with gcc-4.4.x 32-bits toolchains

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When building with a gcc-4.4.x toolchain that is configured to produce
32-bits executables by default, we will produce __lshrti3 in sched_clock()
which is never resolved so the kernel fails to link. Unconditionally use
the inline assembly version as suggested by David Daney, which works around
the issue.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1514/
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Florian Fainelli 2010-07-29 00:13:07 +02:00 committed by Ralf Baechle
parent e10c53a5f3
commit 5c8974538a
1 changed files with 0 additions and 8 deletions
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8
arch/mips/cavium-octeon/csrc-octeon.c
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@ -53,7 +53,6 @@ static struct clocksource clocksource_mips = {
unsigned long long notrace sched_clock(void)
{
/* 64-bit arithmatic can overflow, so use 128-bit. */
#if (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 3))
u64 t1, t2, t3;
unsigned long long rv;
u64 mult = clocksource_mips.mult;
@ -73,13 +72,6 @@ unsigned long long notrace sched_clock(void)
: [cnt] "r" (cnt), [mult] "r" (mult), [shift] "r" (shift)
: "hi", "lo");
return rv;
#else
/* GCC > 4.3 do it the easy way. */
unsigned int __attribute__((mode(TI))) t;
t = read_c0_cvmcount();
t = t * clocksource_mips.mult;
return (unsigned long long)(t >> clocksource_mips.shift);
#endif
}
void __init plat_time_init(void)