forked from Minki/linux
powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code
rfi_flush_enable() includes a check to see if we're already enabled (or disabled), and in that case does nothing. But that means calling setup_rfi_flush() a 2nd time doesn't actually work, which is a bit confusing. Move that check into the debugfs code, where it really belongs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -846,9 +846,6 @@ static void do_nothing(void *unused)
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void rfi_flush_enable(bool enable)
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void rfi_flush_enable(bool enable)
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{
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{
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if (rfi_flush == enable)
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return;
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if (enable) {
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if (enable) {
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do_rfi_flush_fixups(enabled_flush_types);
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do_rfi_flush_fixups(enabled_flush_types);
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on_each_cpu(do_nothing, NULL, 1);
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on_each_cpu(do_nothing, NULL, 1);
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@ -902,13 +899,19 @@ void __init setup_rfi_flush(enum l1d_flush_type types, bool enable)
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#ifdef CONFIG_DEBUG_FS
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#ifdef CONFIG_DEBUG_FS
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static int rfi_flush_set(void *data, u64 val)
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static int rfi_flush_set(void *data, u64 val)
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{
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{
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bool enable;
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if (val == 1)
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if (val == 1)
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rfi_flush_enable(true);
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enable = true;
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else if (val == 0)
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else if (val == 0)
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rfi_flush_enable(false);
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enable = false;
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else
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else
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return -EINVAL;
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return -EINVAL;
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/* Only do anything if we're changing state */
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if (enable != rfi_flush)
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rfi_flush_enable(enable);
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return 0;
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return 0;
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}
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}
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