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MIPS: Optimize current_cpu_type() for better code.

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o Move current_cpu_type() to a separate header file
 o #ifdefing on supported CPU types lets modern GCC know that certain
   code in callers may be discarded ideally turning current_cpu_type() into
   a function returning a constant.
 o Use current_cpu_type() rather than direct access to struct cpuinfo_mips.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5833/
This commit is contained in:
Ralf Baechle
2013-09-17 10:25:47 +02:00
parent ff522058bd
commit 69f24d1784
19 changed files with 236 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/mips/kernel/cpu-probe.c
View File

@@ -20,6 +20,7 @@
#include <asm/bugs.h>
#include <asm/cpu.h>
#include <asm/cpu-type.h>
#include <asm/fpu.h>
#include <asm/mipsregs.h>
#include <asm/watch.h>
@@ -55,7 +56,7 @@ static inline void check_errata(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
switch (c->cputype) {
switch (current_cpu_type()) {
case CPU_34K:
/*
* Erratum "RPS May Cause Incorrect Instruction Execution"

3
arch/mips/kernel/idle.c
View File

@@ -18,6 +18,7 @@
#include <linux/sched.h>
#include <asm/cpu.h>
#include <asm/cpu-info.h>
#include <asm/cpu-type.h>
#include <asm/idle.h>
#include <asm/mipsregs.h>
@@ -136,7 +137,7 @@ void __init check_wait(void)
return;
}
switch (c->cputype) {
switch (current_cpu_type()) {
case CPU_R3081:
case CPU_R3081E:
cpu_wait = r3081_wait;

1
arch/mips/kernel/time.c
View File

@@ -24,6 +24,7 @@
#include <linux/export.h>
#include <asm/cpu-features.h>
#include <asm/cpu-type.h>
#include <asm/div64.h>
#include <asm/smtc_ipi.h>
#include <asm/time.h>

3
arch/mips/kernel/traps.c
View File

@@ -39,6 +39,7 @@
#include <asm/break.h>
#include <asm/cop2.h>
#include <asm/cpu.h>
#include <asm/cpu-type.h>
#include <asm/dsp.h>
#include <asm/fpu.h>
#include <asm/fpu_emulator.h>
@@ -622,7 +623,7 @@ static int simulate_rdhwr(struct pt_regs *regs, int rd, int rt)
regs->regs[rt] = read_c0_count();
return 0;
case 3: /* Count register resolution */
switch (current_cpu_data.cputype) {
switch (current_cpu_type()) {
case CPU_20KC:
case CPU_25KF:
regs->regs[rt] = 1;