summaryrefslogtreecommitdiffstats
path: root/arch/arm/vfp/vfpmodule.c
diff options
context:
space:
mode:
authorRussell King <rmk+kernel@arm.linux.org.uk>2011-07-09 13:44:04 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-07-09 17:11:22 +0100
commitaf61bdf035e2e4dd646b37b270bd558188a127c0 (patch)
tree81eef62331770c2dce693223b458e24c570711de /arch/arm/vfp/vfpmodule.c
parentfe0d42203cb5616eeff68b14576a0f7e2dd56625 (diff)
downloadlinux-af61bdf035e2e4dd646b37b270bd558188a127c0.tar.bz2
ARM: vfp: rename last_VFP_context to vfp_current_hw_state
Rename the slightly confusing 'last_VFP_context' variable to be more descriptive of what it actually is. This variable stores a pointer to the current owner's vfpstate structure for the context held in the VFP hardware. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/vfp/vfpmodule.c')
-rw-r--r--arch/arm/vfp/vfpmodule.c36
1 files changed, 21 insertions, 15 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index f25e7ec89416..3640351171b8 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -33,7 +33,13 @@ void vfp_support_entry(void);
void vfp_null_entry(void);
void (*vfp_vector)(void) = vfp_null_entry;
-union vfp_state *last_VFP_context[NR_CPUS];
+
+/*
+ * The pointer to the vfpstate structure of the thread which currently
+ * owns the context held in the VFP hardware, or NULL if the hardware
+ * context is invalid.
+ */
+union vfp_state *vfp_current_hw_state[NR_CPUS];
/*
* Dual-use variable.
@@ -57,12 +63,12 @@ static void vfp_thread_flush(struct thread_info *thread)
/*
* Disable VFP to ensure we initialize it first. We must ensure
- * that the modification of last_VFP_context[] and hardware disable
+ * that the modification of vfp_current_hw_state[] and hardware disable
* are done for the same CPU and without preemption.
*/
cpu = get_cpu();
- if (last_VFP_context[cpu] == vfp)
- last_VFP_context[cpu] = NULL;
+ if (vfp_current_hw_state[cpu] == vfp)
+ vfp_current_hw_state[cpu] = NULL;
fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
put_cpu();
}
@@ -73,8 +79,8 @@ static void vfp_thread_exit(struct thread_info *thread)
union vfp_state *vfp = &thread->vfpstate;
unsigned int cpu = get_cpu();
- if (last_VFP_context[cpu] == vfp)
- last_VFP_context[cpu] = NULL;
+ if (vfp_current_hw_state[cpu] == vfp)
+ vfp_current_hw_state[cpu] = NULL;
put_cpu();
}
@@ -129,9 +135,9 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v)
* case the thread migrates to a different CPU. The
* restoring is done lazily.
*/
- if ((fpexc & FPEXC_EN) && last_VFP_context[cpu]) {
- vfp_save_state(last_VFP_context[cpu], fpexc);
- last_VFP_context[cpu]->hard.cpu = cpu;
+ if ((fpexc & FPEXC_EN) && vfp_current_hw_state[cpu]) {
+ vfp_save_state(vfp_current_hw_state[cpu], fpexc);
+ vfp_current_hw_state[cpu]->hard.cpu = cpu;
}
/*
* Thread migration, just force the reloading of the
@@ -139,7 +145,7 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v)
* contain stale data.
*/
if (thread->vfpstate.hard.cpu != cpu)
- last_VFP_context[cpu] = NULL;
+ vfp_current_hw_state[cpu] = NULL;
#endif
/*
@@ -415,7 +421,7 @@ static int vfp_pm_suspend(void)
}
/* clear any information we had about last context state */
- memset(last_VFP_context, 0, sizeof(last_VFP_context));
+ memset(vfp_current_hw_state, 0, sizeof(vfp_current_hw_state));
return 0;
}
@@ -451,7 +457,7 @@ void vfp_sync_hwstate(struct thread_info *thread)
* If the thread we're interested in is the current owner of the
* hardware VFP state, then we need to save its state.
*/
- if (last_VFP_context[cpu] == &thread->vfpstate) {
+ if (vfp_current_hw_state[cpu] == &thread->vfpstate) {
u32 fpexc = fmrx(FPEXC);
/*
@@ -473,7 +479,7 @@ void vfp_flush_hwstate(struct thread_info *thread)
* If the thread we're interested in is the current owner of the
* hardware VFP state, then we need to save its state.
*/
- if (last_VFP_context[cpu] == &thread->vfpstate) {
+ if (vfp_current_hw_state[cpu] == &thread->vfpstate) {
u32 fpexc = fmrx(FPEXC);
fmxr(FPEXC, fpexc & ~FPEXC_EN);
@@ -482,7 +488,7 @@ void vfp_flush_hwstate(struct thread_info *thread)
* Set the context to NULL to force a reload the next time
* the thread uses the VFP.
*/
- last_VFP_context[cpu] = NULL;
+ vfp_current_hw_state[cpu] = NULL;
}
#ifdef CONFIG_SMP
@@ -514,7 +520,7 @@ static int vfp_hotplug(struct notifier_block *b, unsigned long action,
{
if (action == CPU_DYING || action == CPU_DYING_FROZEN) {
unsigned int cpu = (long)hcpu;
- last_VFP_context[cpu] = NULL;
+ vfp_current_hw_state[cpu] = NULL;
} else if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
vfp_enable(NULL);
return NOTIFY_OK;