From c1a72173ab156306666cb531f891f32e4e21d592 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Wed, 19 Sep 2007 14:38:12 +1000 Subject: [PATCH] [POWERPC] spufs: Don't return -ENOSYS as extra notes size if spufs is not loaded Because the SPU coredump code might be built as part of a module (spufs), we have a stub which is called by the coredump code, this routine then calls into spufs if it's loaded. Unfortunately the stub returns -ENOSYS if spufs is not loaded, which is interpreted by the coredump code as an extra note size of -38 bytes. This leads to a corrupt core dump. If spufs is not loaded there will be no SPU ELF notes to write, and so the extra notes size will be == 0. Signed-off-by: Michael Ellerman Signed-off-by: Jeremy Kerr Acked-by: Arnd Bergmann Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/cell/spu_coredump.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/cell/spu_coredump.c b/arch/powerpc/platforms/cell/spu_coredump.c index 4fd37ff1e210..656a8c52cd38 100644 --- a/arch/powerpc/platforms/cell/spu_coredump.c +++ b/arch/powerpc/platforms/cell/spu_coredump.c @@ -31,15 +31,19 @@ static DEFINE_MUTEX(spu_coredump_mutex); int arch_notes_size(void) { - long ret; + int ret; - ret = -ENOSYS; mutex_lock(&spu_coredump_mutex); + if (spu_coredump_calls && try_module_get(spu_coredump_calls->owner)) { ret = spu_coredump_calls->arch_notes_size(); module_put(spu_coredump_calls->owner); + } else { + ret = 0; } + mutex_unlock(&spu_coredump_mutex); + return ret; } -- GitLab