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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-14 23:40:38 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-27 10:25:11 +0200 |
| commit | 1e2a9fc7496955faacbbed49461d611b704a7505 (patch) | |
| tree | 72c09f6a6615437427afb9ec47d518bc25104214 /arch/powerpc/kernel/setup_64.c | |
| parent | powerpc/perf: Add blacklisted events for Power9 DD2.2 (diff) | |
| download | linux-1e2a9fc7496955faacbbed49461d611b704a7505.tar.xz linux-1e2a9fc7496955faacbbed49461d611b704a7505.zip | |
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>
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index c388cc3357fa..3efc01a570e8 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -846,9 +846,6 @@ static void do_nothing(void *unused) void rfi_flush_enable(bool enable) { - if (rfi_flush == enable) - return; - if (enable) { do_rfi_flush_fixups(enabled_flush_types); on_each_cpu(do_nothing, NULL, 1); @@ -902,13 +899,19 @@ void __init setup_rfi_flush(enum l1d_flush_type types, bool enable) #ifdef CONFIG_DEBUG_FS static int rfi_flush_set(void *data, u64 val) { + bool enable; + if (val == 1) - rfi_flush_enable(true); + enable = true; else if (val == 0) - rfi_flush_enable(false); + enable = false; else return -EINVAL; + /* Only do anything if we're changing state */ + if (enable != rfi_flush) + rfi_flush_enable(enable); + return 0; } |