fix maxcpus=N parsing

Commit 61ec7567db103d537329b0db9a887db570431ff4 ('ACPI: boot correctly
with "nosmp" or "maxcpus=0"') broke 'maxcpus=' handling on x86[-64].

maxcpus=N is now having no effect on x86_64, and freezing bootup on i386
(because of inconsistency with the separate maxcpus parsing down in
arch/i386, I guess).  That's because early_param parsing is a little
different from __setup parsing, and needs the "=" omitted: then it seems
to work as the original commit intended (no mention of IO-APIC in
/proc/interrupts when maxcpus=0).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/init/main.c b/init/main.c
index cc0653ec081d7d50893bc3e35f24697abb445869..450e6ee52ab6fd39fa92e7cef34f3d42a5443170 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -168,7 +168,7 @@ static int __init maxcpus(char *str)
        return 0;
 }
 
-early_param("maxcpus=", maxcpus);
+early_param("maxcpus", maxcpus);
 #else
 #define max_cpus NR_CPUS
 #endif