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Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Subject: [PATCH -hyperv 2/3] x86/hyperv: Use current_stack_pointer to avoid asm() in hv_hvcrash_ctxt_save() Date: Wed, 11 Mar 2026 11:25:59 +0100 Message-ID: <20260311102658.215693-2-ubizjak@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260311102658.215693-1-ubizjak@gmail.com> References: <20260311102658.215693-1-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Use current_stack_pointer to avoid asm() when saving %rsp to the crash context memory in hv_hvcrash_ctxt_save(). The new code is more readable and results in exactly the same object file. Signed-off-by: Uros Bizjak Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Wei Liu Cc: Dexuan Cui Cc: Long Li Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" --- arch/x86/hyperv/hv_crash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/hyperv/hv_crash.c b/arch/x86/hyperv/hv_crash.c index 2c7ea7e70854..d0f95a278fdb 100644 --- a/arch/x86/hyperv/hv_crash.c +++ b/arch/x86/hyperv/hv_crash.c @@ -199,7 +199,7 @@ static void hv_hvcrash_ctxt_save(void) { struct hv_crash_ctxt *ctxt = &hv_crash_ctxt; - asm volatile("movq %%rsp,%0" : "=m"(ctxt->rsp)); + ctxt->rsp = current_stack_pointer; ctxt->cr0 = native_read_cr0(); ctxt->cr4 = native_read_cr4(); -- 2.53.0