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arm64: debug: remove redundant spsr manipulation

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There is no need to explicitly clear the SS bit immediately before
setting it unconditionally.

Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Will Deacon 2016-07-19 15:07:38 +01:00 committed by Catalin Marinas
parent 2ce39ad151
commit 6b68e14e71
1 changed files with 2 additions and 11 deletions
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13
arch/arm64/kernel/debug-monitors.c
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@ -165,21 +165,12 @@ postcore_initcall(debug_monitors_init);
*/
static void set_regs_spsr_ss(struct pt_regs *regs)
{
unsigned long spsr;
spsr = regs->pstate;
spsr &= ~DBG_SPSR_SS;
spsr |= DBG_SPSR_SS;
regs->pstate = spsr;
regs->pstate |= DBG_SPSR_SS;
}
static void clear_regs_spsr_ss(struct pt_regs *regs)
{
unsigned long spsr;
spsr = regs->pstate;
spsr &= ~DBG_SPSR_SS;
regs->pstate = spsr;
regs->pstate &= ~DBG_SPSR_SS;
}
/* EL1 Single Step Handler hooks */