Commit fd5ed306 authored by Markos Chandras's avatar Markos Chandras Committed by Ralf Baechle

MIPS: kernel: smp-cps: Fix 64-bit compatibility errors due to pointer casting

Commit 1d8f1f5a ("MIPS: smp-cps: hotplug support") added hotplug
support in the SMP/CPS implementation but it introduced a few build problems
on 64-bit kernels due to pointer being casted to and from 'int' C types. We
fix this problem by using 'unsigned long' instead which should match the size
of the pointers in 32/64-bit kernels. Finally, we fix the comment since the
CM base address is loaded to v1($3) instead of v0.

Fixes the following build problems:

arch/mips/kernel/smp-cps.c: In function 'wait_for_sibling_halt':
arch/mips/kernel/smp-cps.c:366:17: error: cast from pointer to integer of
different size [-Werror=pointer-to-int-cast]
[...]
arch/mips/kernel/smp-cps.c: In function 'cps_cpu_die':
arch/mips/kernel/smp-cps.c:427:13: error: cast to pointer
from integer of different size [-Werror=int-to-pointer-cast]

cc1: all warnings being treated as errors

Fixes: 1d8f1f5a ("MIPS: smp-cps: hotplug support")
Cc: <stable@vger.kernel.org> # 3.16+
Reviewed-by: default avatarPaul Burton <paul.burton@imgtec.com>
Signed-off-by: default avatarMarkos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10586/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 143fefc8
......@@ -133,7 +133,7 @@ static void __init cps_prepare_cpus(unsigned int max_cpus)
/*
* Patch the start of mips_cps_core_entry to provide:
*
* v0 = CM base address
* v1 = CM base address
* s0 = kseg0 CCA
*/
entry_code = (u32 *)&mips_cps_core_entry;
......@@ -369,7 +369,7 @@ void play_dead(void)
static void wait_for_sibling_halt(void *ptr_cpu)
{
unsigned cpu = (unsigned)ptr_cpu;
unsigned cpu = (unsigned long)ptr_cpu;
unsigned vpe_id = cpu_vpe_id(&cpu_data[cpu]);
unsigned halted;
unsigned long flags;
......@@ -430,7 +430,7 @@ static void cps_cpu_die(unsigned int cpu)
*/
err = smp_call_function_single(cpu_death_sibling,
wait_for_sibling_halt,
(void *)cpu, 1);
(void *)(unsigned long)cpu, 1);
if (err)
panic("Failed to call remote sibling CPU\n");
}
......
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