From: Heiko Carstens Date: Wed, 12 Aug 2020 16:55:41 +0000 (+0200) Subject: s390/runtime_instrumentation: fix storage key handling X-Git-Tag: v5.15~3038^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9eaba29c7985236e16468f4e6a49cc18cf01443e;p=platform%2Fkernel%2Flinux-starfive.git s390/runtime_instrumentation: fix storage key handling The key member of the runtime instrumentation control block contains only the access key, not the complete storage key. Therefore the value must be shifted by four bits. Note: this is only relevant for debugging purposes in case somebody compiles a kernel with a default storage access key set to a value not equal to zero. Fixes: e4b8b3f33fca ("s390: add support for runtime instrumentation") Reported-by: Claudio Imbrenda Signed-off-by: Heiko Carstens --- diff --git a/arch/s390/kernel/runtime_instr.c b/arch/s390/kernel/runtime_instr.c index 125c7f6..1788a54 100644 --- a/arch/s390/kernel/runtime_instr.c +++ b/arch/s390/kernel/runtime_instr.c @@ -57,7 +57,7 @@ static void init_runtime_instr_cb(struct runtime_instr_cb *cb) cb->k = 1; cb->ps = 1; cb->pc = 1; - cb->key = PAGE_DEFAULT_KEY; + cb->key = PAGE_DEFAULT_KEY >> 4; cb->v = 1; }