parisc: Use num_present_cpus() in alternative patching code

commit b6405f0829d7b1dd926ba3ca5f691cab835abfaa upstream.

When patching the kernel code some alternatives depend on SMP vs. !SMP.
Use the value of num_present_cpus() instead of num_online_cpus() to
decide, otherwise we may run into issues if and additional CPU is
enabled after having loaded a module while only one CPU was enabled.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v6.1+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/parisc/kernel/alternative.c b/arch/parisc/kernel/alternative.c
index 66f5672c70bd469e6e1a261c4a7c080be1d808f5..25c4d6c3375db357f73c12e48826c941b92fc621 100644 (file)
--- a/arch/parisc/kernel/alternative.c
+++ b/arch/parisc/kernel/alternative.c
@@ -25,7 +25,7 @@ void __init_or_module apply_alternatives(struct alt_instr *start,
 {
        struct alt_instr *entry;
        int index = 0, applied = 0;
-       int num_cpus = num_online_cpus();
+       int num_cpus = num_present_cpus();
        u16 cond_check;
 
        cond_check = ALT_COND_ALWAYS |