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[108.93.236.139]) by smtp.gmail.com with ESMTPSA id 00721157ae682-8b0e5888374sm30064117b3.9.2026.10.18.07.22.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Oct 2026 07:22:36 -0700 (PDT) From: Matt Turner Date: Sun, 18 Oct 2026 10:22:03 -0400 Subject: [PATCH v3 3/5] alpha: use user_stack_pointer() in KSTK_ESP() and dump_elf_thread() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261018-alpha-perf-regs-v3-v3-3-52be85332c57@gmail.com> References: <20261018-alpha-perf-regs-v3-v3-0-52be85332c57@gmail.com> In-Reply-To: <20261018-alpha-perf-regs-v3-v3-0-52be85332c57@gmail.com> To: Richard Henderson , Magnus Lindholm Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-perf-users@vger.kernel.org, Ian Rogers , Matt Turner X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1497; i=mattst88@gmail.com; h=from:subject:message-id; bh=Wz3AynSRouhjdOCDf3ZwA/+MVGmp61qIW0ierhI97O4=; b=owGbwMvMwCW25rVmCc8sv+mMp9WSGLKuXOM0nLfE6+wE3UYWDfllErc8VFat3D6l4cPGHZFfN pyIlWNV6fjIwiDGxTBTTJElbr0iy6y2HUt9Tkv/gpnDygQyRFqkgQEIWBj4chPzSo10jPRMtQ31 DIEMHaN4iJweg0ZmcXFpapFuWkGRQ15+SWJJZn5esV5+QWpeQXqBXlpmWklGRn5RcSrQCL281BJ TV0c3I0MDE0tHCzMnC0dTE2dnJ0MnN0dHZ1cnI0tzEwNnS0cTV0tzBi5OAZhrWp8wMuw48G0dr4 HQU+nXD7snpn56+Xe/bdfNJw+D6h6kXrtfevkEw3/PLq+qlXGyRw4z377+UM71z49SLzbLaAOmw 30LFilrGjIDAA== X-Developer-Key: i=mattst88@gmail.com; a=openpgp; fpr=3BB639E56F861FA2E86505690FDD682D974CA72A Both open-code the same PCB lookup. Assisted-by: Claude:claude-opus-5-5 Tested-by: Magnus Lindholm Reviewed-by: Magnus Lindholm Acked-by: Ian Rogers Signed-off-by: Matt Turner --- arch/alpha/include/asm/processor.h | 3 +-- arch/alpha/kernel/process.c | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index c461a26d47b3..73251cd671e0 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -43,8 +43,7 @@ unsigned long __get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) -#define KSTK_ESP(tsk) \ - ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp) +#define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk)) #define cpu_relax() barrier() diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c index 06522451f018..7861c9e767b7 100644 --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -318,7 +318,7 @@ dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt, struct thread_info *ti) dest[27] = pt->r27; dest[28] = pt->r28; dest[29] = pt->gp; - dest[30] = ti == current_thread_info() ? rdusp() : ti->pcb.usp; + dest[30] = user_stack_pointer(pt); dest[31] = pt->pc; /* Once upon a time this was the PS value. Which is stupid -- 2.55.0