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Wed, 07 Jan 2026 21:31:39 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 39/50] linux-user/arm: Drop CONFIG_ATOMIC64 test Date: Thu, 8 Jan 2026 16:30:07 +1100 Message-ID: <20260108053018.626690-40-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260108053018.626690-1-richard.henderson@linaro.org> References: <20260108053018.626690-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::531; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x531.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1767850702442158500 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson Reviewed-by: Pierrick Bouvier --- linux-user/arm/cpu_loop.c | 19 +------------------ 1 file changed, 1 insertion(+), 18 deletions(-) diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c index cd89b7d6f5..40aefc4c1d 100644 --- a/linux-user/arm/cpu_loop.c +++ b/linux-user/arm/cpu_loop.c @@ -146,25 +146,8 @@ static void arm_kernel_cmpxchg64_helper(CPUARMState *e= nv) /* Swap if host !=3D guest endianness, for the host cmpxchg below */ oldval =3D tswap64(oldval); newval =3D tswap64(newval); - -#ifdef CONFIG_ATOMIC64 - val =3D qatomic_cmpxchg__nocheck(host_addr, oldval, newval); + val =3D qatomic_cmpxchg(host_addr, oldval, newval); cpsr =3D (val =3D=3D oldval) * CPSR_C; -#else - /* - * This only works between threads, not between processes, but since - * the host has no 64-bit cmpxchg, it is the best that we can do. - */ - start_exclusive(); - val =3D *host_addr; - if (val =3D=3D oldval) { - *host_addr =3D newval; - cpsr =3D CPSR_C; - } else { - cpsr =3D 0; - } - end_exclusive(); -#endif mmap_unlock(); =20 cpsr_write(env, cpsr, CPSR_C, CPSRWriteByInstr); --=20 2.43.0