diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-22 00:19:50 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 19:44:45 +0200 |
| commit | d04664376129b34dab6607f5cec04748e51e9643 (patch) | |
| tree | e6b99c407fdaeb75d9b8a1ac8e222aadf2f174de /arch/powerpc/kernel | |
| parent | f93ae3415cf7d1fdc23344c11a642ff7015ad2a5 (diff) | |
powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code
commit 1e2a9fc7496955faacbbed49461d611b704a7505 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -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 1d2712d628c3..5bb4a6811371 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -873,9 +873,6 @@ 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); @@ -929,13 +926,19 @@ 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; } |