Messages in this thread Patch in this message | | | From | Michael Ellerman <> | Subject | [PATCH 07/15] Don't return -ENOSYS as extra notes size if spufs is not loaded | Date | Wed, 12 Sep 2007 17:43:44 +1000 (EST) |
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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 <michael@ellerman.id.au> --- arch/powerpc/platforms/cell/spu_coredump.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/cell/spu_coredump.c b/arch/powerpc/platforms/cell/spu_coredump.c index 4fd37ff..656a8c5 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; } -- 1.5.1.3.g7a33b - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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