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hw-breakpoints, x86: Fix modular KVM build 

This build error:

arch/x86/kvm/x86.c:3655: error: implicit declaration of function 'hw_breakpoint_restore'

Happens because in the CONFIG_KVM=m case there's no 'CONFIG_KVM' define
in the kernel - it's CONFIG_KVM_MODULE in that case.

Make the prototype available unconditionally.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
LKML-Reference: <1258114575-32655-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-11-14 01:35:29 +01:00
parent 688bcaff29
commit 68efa37df7
2 changed files with 2 additions and 4 deletions
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2
arch/x86/include/asm/debugreg.h
View File

@ -96,9 +96,7 @@ static inline int hw_breakpoint_active(void)
extern void aout_dump_debugregs(struct user *dump);
#ifdef CONFIG_KVM
extern void hw_breakpoint_restore(void);
#endif
#endif /* __KERNEL__ */

4
arch/x86/kernel/hw_breakpoint.c
View File

@ -43,6 +43,7 @@
/* Per cpu debug control register value */
DEFINE_PER_CPU(unsigned long, dr7);
EXPORT_PER_CPU_SYMBOL(dr7);
/* Per cpu debug address registers values */
static DEFINE_PER_CPU(unsigned long, cpu_debugreg[HBP_NUM]);
@ -409,6 +410,7 @@ void aout_dump_debugregs(struct user *dump)
dump->u_debugreg[7] = dr7;
}
EXPORT_SYMBOL_GPL(aout_dump_debugregs);
/*
* Release the user breakpoints used by ptrace
@ -424,7 +426,6 @@ void flush_ptrace_hw_breakpoint(struct task_struct *tsk)
}
}
#ifdef CONFIG_KVM
void hw_breakpoint_restore(void)
{
set_debugreg(__get_cpu_var(cpu_debugreg[0]), 0);
@ -435,7 +436,6 @@ void hw_breakpoint_restore(void)
set_debugreg(__get_cpu_var(dr7), 7);
}
EXPORT_SYMBOL_GPL(hw_breakpoint_restore);
#endif
/*
* Handle debug exception notifications.