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powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable
Instead of disabling only first watchpoint, disable all available watchpoints while clearing dawr_force_enable. Callback function is used only for disabling watchpoint, rename it to disable_dawrs_cb(). And null_brk parameter is not really required while disabling watchpoint, remove it. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Michael Neuling <mikey@neuling.org> Link: https://lore.kernel.org/r/20200514111741.97993-9-ravi.bangoria@linux.ibm.com
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c291913273
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1 changed files with 7 additions and 3 deletions
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@ -50,9 +50,13 @@ int set_dawr(int nr, struct arch_hw_breakpoint *brk)
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return 0;
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}
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static void set_dawr_cb(void *info)
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static void disable_dawrs_cb(void *info)
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{
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set_dawr(0, info);
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struct arch_hw_breakpoint null_brk = {0};
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int i;
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for (i = 0; i < nr_wp_slots(); i++)
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set_dawr(i, &null_brk);
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}
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static ssize_t dawr_write_file_bool(struct file *file,
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@ -74,7 +78,7 @@ static ssize_t dawr_write_file_bool(struct file *file,
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/* If we are clearing, make sure all CPUs have the DAWR cleared */
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if (!dawr_force_enable)
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smp_call_function(set_dawr_cb, &null_brk, 0);
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smp_call_function(disable_dawrs_cb, NULL, 0);
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return rc;
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}
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