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powerpc: silence a -Wcast-function-type warning in dawr_write_file_bool

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In commit c1fe190c06 ("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: c1fe190c06 ("powerpc: Add force enable of DAWR on P9 option")
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Mathieu Malaterre 2019-06-04 13:00:36 +10:00 committed by Michael Ellerman
parent 6c46fcce39
commit 548c54acba
1 changed files with 6 additions and 1 deletions
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7
arch/powerpc/kernel/hw_breakpoint.c
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@ -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;
}