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authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>2015-09-29 10:04:41 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-10-14 14:32:08 +0200
commitb5510d9b68c33964abd938148f407ad3789e369f (patch)
tree7cf0eb3e5e74e861030f850c8c0894095ac70bc9 /arch/s390/include/asm/ctl_reg.h
parent395e6aa1d0ffbc493a04469aa8f6751ed2aad8c5 (diff)
s390/fpu: always enable the vector facility if it is available
If the kernel detects that the s390 hardware supports the vector facility, it is enabled by default at an early stage. To force it off, use the novx kernel parameter. Note that there is a small time window, where the vector facility is enabled before it is forced to be off. With enabling the vector facility by default, the FPU save and restore functions can be improved. They do not longer require to manage expensive control register updates to enable or disable the vector enablement control for particular processes. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ctl_reg.h')
-rw-r--r--arch/s390/include/asm/ctl_reg.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h
index 17a373576868..d7697ab802f6 100644
--- a/arch/s390/include/asm/ctl_reg.h
+++ b/arch/s390/include/asm/ctl_reg.h
@@ -46,8 +46,6 @@ static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
__ctl_load(reg, cr, cr);
}
-void __ctl_set_vx(void);
-
void smp_ctl_set_bit(int cr, int bit);
void smp_ctl_clear_bit(int cr, int bit);

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