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| author |  Nicholas Piggin <npiggin@gmail.com>
| 2022-11-27 22:49:40 +1000 |
|---|---|---|
| committer |  Michael Ellerman <mpe@ellerman.id.au>
| 2022-12-02 17:54:09 +1100 |
| commit | 90f1b43196c5e79f6c986a359011a19857984c27 (patch) | |
| tree | af5ff5534895e1da6b5672b58a7292726e5ba8d0 /arch/powerpc/kernel/smp.c | |
| parent | powerpc: split validate_sp into two functions (diff) | |
| download | linux-90f1b43196c5e79f6c986a359011a19857984c27.tar.gz linux-90f1b43196c5e79f6c986a359011a19857984c27.tar.bz2 linux-90f1b43196c5e79f6c986a359011a19857984c27.zip | |
powerpc: allow minimum sized kernel stack frames
This affects only 64-bit ELFv2 kernels, and reduces the minimum
asm-created stack frame size from 112 to 32 byte on those kernels.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221127124942.1665522-16-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 0da6e59161cd..6b90f10a6c81 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -1249,7 +1249,7 @@ static void cpu_idle_thread_init(unsigned int cpu, struct task_struct *idle) #ifdef CONFIG_PPC64 paca_ptrs[cpu]->__current = idle; paca_ptrs[cpu]->kstack = (unsigned long)task_stack_page(idle) + - THREAD_SIZE - STACK_FRAME_OVERHEAD; + THREAD_SIZE - STACK_FRAME_MIN_SIZE; #endif task_thread_info(idle)->cpu = cpu; secondary_current = current_set[cpu] = idle; |