From 548c54acba5bd1388d50727a9a126a42d0cd4ad0 Mon Sep 17 00:00:00 2001 From: Mathieu Malaterre Date: Tue, 4 Jun 2019 13:00:36 +1000 Subject: [PATCH] powerpc: silence a -Wcast-function-type warning in dawr_write_file_bool In commit c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option") the following piece of code was added: smp_call_function((smp_call_func_t)set_dawr, &null_brk, 0); Since GCC 8 this triggers the following warning about incompatible function types: arch/powerpc/kernel/hw_breakpoint.c:408:21: error: cast between incompatible function types from 'int (*)(struct arch_hw_breakpoint *)' to 'void (*)(void *)' [-Werror=cast-function-type] Since the warning is there for a reason, and should not be hidden behind a cast, provide an intermediate callback function to avoid the warning. Fixes: c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option") Suggested-by: Christoph Hellwig Signed-off-by: Mathieu Malaterre Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/hw_breakpoint.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index da307dd..ca3a235 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -384,6 +384,11 @@ void hw_breakpoint_pmu_read(struct perf_event *bp) bool dawr_force_enable; EXPORT_SYMBOL_GPL(dawr_force_enable); +static void set_dawr_cb(void *info) +{ + set_dawr(info); +} + static ssize_t dawr_write_file_bool(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) @@ -403,7 +408,7 @@ static ssize_t dawr_write_file_bool(struct file *file, /* If we are clearing, make sure all CPUs have the DAWR cleared */ if (!dawr_force_enable) - smp_call_function((smp_call_func_t)set_dawr, &null_brk, 0); + smp_call_function(set_dawr_cb, &null_brk, 0); return rc; } -- 2.7.4