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Date: Thu, 1 Jan 2015 18:48:27 +0100
From: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To: Ralf Baechle <ralf@...ux-mips.org>,
Markos Chandras <markos.chandras@...tec.com>
Cc: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
Paul Burton <paul.burton@...tec.com>,
Leonid Yegoshin <Leonid.Yegoshin@...tec.com>,
John Crispin <blogic@...nwrt.org>,
James Hogan <james.hogan@...tec.com>,
linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arch: mips: kernel: traps: Remove some unused functions
Removes some functions that are not used anywhere:
do_bp() do_ftlb() do_dsp() do_mcheck() do_mdmx() do_msa() do_msa_fpe()
This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
arch/mips/kernel/traps.c | 185 ----------------------------------------------
1 file changed, 185 deletions(-)
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 22b19c2..59c8e0d 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -854,85 +854,6 @@ static void do_trap_or_bp(struct pt_regs *regs, unsigned int code,
}
}
-asmlinkage void do_bp(struct pt_regs *regs)
-{
- unsigned int opcode, bcode;
- enum ctx_state prev_state;
- unsigned long epc;
- u16 instr[2];
- mm_segment_t seg;
-
- seg = get_fs();
- if (!user_mode(regs))
- set_fs(KERNEL_DS);
-
- prev_state = exception_enter();
- if (get_isa16_mode(regs->cp0_epc)) {
- /* Calculate EPC. */
- epc = exception_epc(regs);
- if (cpu_has_mmips) {
- if ((__get_user(instr[0], (u16 __user *)msk_isa16_mode(epc)) ||
- (__get_user(instr[1], (u16 __user *)msk_isa16_mode(epc + 2)))))
- goto out_sigsegv;
- opcode = (instr[0] << 16) | instr[1];
- } else {
- /* MIPS16e mode */
- if (__get_user(instr[0],
- (u16 __user *)msk_isa16_mode(epc)))
- goto out_sigsegv;
- bcode = (instr[0] >> 6) & 0x3f;
- do_trap_or_bp(regs, bcode, "Break");
- goto out;
- }
- } else {
- if (__get_user(opcode,
- (unsigned int __user *) exception_epc(regs)))
- goto out_sigsegv;
- }
-
- /*
- * There is the ancient bug in the MIPS assemblers that the break
- * code starts left to bit 16 instead to bit 6 in the opcode.
- * Gas is bug-compatible, but not always, grrr...
- * We handle both cases with a simple heuristics. --macro
- */
- bcode = ((opcode >> 6) & ((1 << 20) - 1));
- if (bcode >= (1 << 10))
- bcode >>= 10;
-
- /*
- * notify the kprobe handlers, if instruction is likely to
- * pertain to them.
- */
- switch (bcode) {
- case BRK_KPROBE_BP:
- if (notify_die(DIE_BREAK, "debug", regs, bcode,
- regs_to_trapnr(regs), SIGTRAP) == NOTIFY_STOP)
- goto out;
- else
- break;
- case BRK_KPROBE_SSTEPBP:
- if (notify_die(DIE_SSTEPBP, "single_step", regs, bcode,
- regs_to_trapnr(regs), SIGTRAP) == NOTIFY_STOP)
- goto out;
- else
- break;
- default:
- break;
- }
-
- do_trap_or_bp(regs, bcode, "Break");
-
-out:
- set_fs(seg);
- exception_exit(prev_state);
- return;
-
-out_sigsegv:
- force_sig(SIGSEGV, current);
- goto out;
-}
-
asmlinkage void do_tr(struct pt_regs *regs)
{
u32 opcode, tcode = 0;
@@ -1297,46 +1218,6 @@ out:
exception_exit(prev_state);
}
-asmlinkage void do_msa_fpe(struct pt_regs *regs)
-{
- enum ctx_state prev_state;
-
- prev_state = exception_enter();
- die_if_kernel("do_msa_fpe invoked from kernel context!", regs);
- force_sig(SIGFPE, current);
- exception_exit(prev_state);
-}
-
-asmlinkage void do_msa(struct pt_regs *regs)
-{
- enum ctx_state prev_state;
- int err;
-
- prev_state = exception_enter();
-
- if (!cpu_has_msa || test_thread_flag(TIF_32BIT_FPREGS)) {
- force_sig(SIGILL, current);
- goto out;
- }
-
- die_if_kernel("do_msa invoked from kernel context!", regs);
-
- err = enable_restore_fp_context(1);
- if (err)
- force_sig(SIGILL, current);
-out:
- exception_exit(prev_state);
-}
-
-asmlinkage void do_mdmx(struct pt_regs *regs)
-{
- enum ctx_state prev_state;
-
- prev_state = exception_enter();
- force_sig(SIGILL, current);
- exception_exit(prev_state);
-}
-
/*
* Called with interrupts disabled.
*/
@@ -1370,36 +1251,6 @@ asmlinkage void do_watch(struct pt_regs *regs)
exception_exit(prev_state);
}
-asmlinkage void do_mcheck(struct pt_regs *regs)
-{
- const int field = 2 * sizeof(unsigned long);
- int multi_match = regs->cp0_status & ST0_TS;
- enum ctx_state prev_state;
-
- prev_state = exception_enter();
- show_regs(regs);
-
- if (multi_match) {
- printk("Index : %0x\n", read_c0_index());
- printk("Pagemask: %0x\n", read_c0_pagemask());
- printk("EntryHi : %0*lx\n", field, read_c0_entryhi());
- printk("EntryLo0: %0*lx\n", field, read_c0_entrylo0());
- printk("EntryLo1: %0*lx\n", field, read_c0_entrylo1());
- printk("\n");
- dump_tlb_all();
- }
-
- show_code((unsigned int __user *) regs->cp0_epc);
-
- /*
- * Some chips may have other causes of machine check (e.g. SB1
- * graduation timer)
- */
- panic("Caught Machine Check exception - %scaused by multiple "
- "matching entries in the TLB.",
- (multi_match) ? "" : "not ");
-}
-
asmlinkage void do_mt(struct pt_regs *regs)
{
int subcode;
@@ -1436,14 +1287,6 @@ asmlinkage void do_mt(struct pt_regs *regs)
}
-asmlinkage void do_dsp(struct pt_regs *regs)
-{
- if (cpu_has_dsp)
- panic("Unexpected DSP exception");
-
- force_sig(SIGILL, current);
-}
-
asmlinkage void do_reserved(struct pt_regs *regs)
{
/*
@@ -1609,34 +1452,6 @@ asmlinkage void cache_parity_error(void)
panic("Can't handle the cache error!");
}
-asmlinkage void do_ftlb(void)
-{
- const int field = 2 * sizeof(unsigned long);
- unsigned int reg_val;
-
- /* For the moment, report the problem and hang. */
- if (cpu_has_mips_r2 &&
- ((current_cpu_data.processor_id & 0xff0000) == PRID_COMP_MIPS)) {
- pr_err("FTLB error exception, cp0_ecc=0x%08x:\n",
- read_c0_ecc());
- pr_err("cp0_errorepc == %0*lx\n", field, read_c0_errorepc());
- reg_val = read_c0_cacheerr();
- pr_err("c0_cacheerr == %08x\n", reg_val);
-
- if ((reg_val & 0xc0000000) == 0xc0000000) {
- pr_err("Decoded c0_cacheerr: FTLB parity error\n");
- } else {
- pr_err("Decoded c0_cacheerr: %s cache fault in %s reference.\n",
- reg_val & (1<<30) ? "secondary" : "primary",
- reg_val & (1<<31) ? "data" : "insn");
- }
- } else {
- pr_err("FTLB error exception\n");
- }
- /* Just print the cacheerr bits for now */
- cache_parity_error();
-}
-
/*
* SDBBP EJTAG debug exception handler.
* We skip the instruction and return to the next instruction.
--
1.7.10.4
--
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