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authorTejun Heo <tj@kernel.org>2009-11-25 22:24:44 +0900
committerIngo Molnar <mingo@elte.hu>2009-11-25 14:30:04 +0100
commit28b4e0d86acf59ae3bc422921138a4958458326e (patch)
treea2fa63186bc43ab79b200468bf4c5d7117f92597
parent99df5a6a215f026e62287083de2b44b22edd3623 (diff)
x86: Rename global percpu symbol dr7 to cpu_dr7
Percpu symbols now occupy the same namespace as other global symbols and as such short global symbols without subsystem prefix tend to collide with local variables. dr7 percpu variable used by x86 was hit by this. Rename it to cpu_dr7. The rename also makes it more consistent with its fellow cpu_debugreg percpu variable. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org>, Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <20091125115856.GA17856@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
-rw-r--r--arch/x86/include/asm/debugreg.h4
-rw-r--r--arch/x86/kernel/hw_breakpoint.c10
2 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index fdabd8435765..8240f76b531e 100644
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -75,7 +75,7 @@
*/
#ifdef __KERNEL__
-DECLARE_PER_CPU(unsigned long, dr7);
+DECLARE_PER_CPU(unsigned long, cpu_dr7);
static inline void hw_breakpoint_disable(void)
{
@@ -91,7 +91,7 @@ static inline void hw_breakpoint_disable(void)
static inline int hw_breakpoint_active(void)
{
- return __get_cpu_var(dr7) & DR_GLOBAL_ENABLE_MASK;
+ return __get_cpu_var(cpu_dr7) & DR_GLOBAL_ENABLE_MASK;
}
extern void aout_dump_debugregs(struct user *dump);
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 4d267fb77828..92ea5aad0b5c 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -46,8 +46,8 @@
#include <asm/debugreg.h>
/* Per cpu debug control register value */
-DEFINE_PER_CPU(unsigned long, dr7);
-EXPORT_PER_CPU_SYMBOL(dr7);
+DEFINE_PER_CPU(unsigned long, cpu_dr7);
+EXPORT_PER_CPU_SYMBOL(cpu_dr7);
/* Per cpu debug address registers values */
static DEFINE_PER_CPU(unsigned long, cpu_debugreg[HBP_NUM]);
@@ -118,7 +118,7 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
set_debugreg(info->address, i);
__get_cpu_var(cpu_debugreg[i]) = info->address;
- dr7 = &__get_cpu_var(dr7);
+ dr7 = &__get_cpu_var(cpu_dr7);
*dr7 |= encode_dr7(i, info->len, info->type);
set_debugreg(*dr7, 7);
@@ -153,7 +153,7 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
if (WARN_ONCE(i == HBP_NUM, "Can't find any breakpoint slot"))
return;
- dr7 = &__get_cpu_var(dr7);
+ dr7 = &__get_cpu_var(cpu_dr7);
*dr7 &= ~encode_dr7(i, info->len, info->type);
set_debugreg(*dr7, 7);
@@ -437,7 +437,7 @@ void hw_breakpoint_restore(void)
set_debugreg(__get_cpu_var(cpu_debugreg[2]), 2);
set_debugreg(__get_cpu_var(cpu_debugreg[3]), 3);
set_debugreg(current->thread.debugreg6, 6);
- set_debugreg(__get_cpu_var(dr7), 7);
+ set_debugreg(__get_cpu_var(cpu_dr7), 7);
}
EXPORT_SYMBOL_GPL(hw_breakpoint_restore);