diff options
| author | Matt Turner <mattst88@gmail.com> | 2026-10-18 10:22:02 -0400 |
|---|---|---|
| committer | Magnus Lindholm <linmag7@gmail.com> | 2026-10-18 20:09:29 +0200 |
| commit | 501bcb5953cc4d56537a321c00f9193e9fd68718 (patch) | |
| tree | 3d372069a29e776a0ce899fd392fc2347e2f7b7c /arch/alpha/include/uapi | |
| parent | bceba446fa2bc66a905ec0bbf6fd80e98701c1d1 (diff) | |
alpha: stop storing the user stack pointer in pt_regs
Nothing reads pt_regs->usp now that user_stack_pointer() uses the PCB.
Drop the stores, which saves a PAL_rdusp call on every syscall, and
give the field back its old name.
Assisted-by: Claude:claude-opus-5-5
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Acked-by: Ian Rogers <irogers@google.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
Link: https://lore.kernel.org/r/20261018-alpha-perf-regs-v3-v3-2-52be85332c57@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Diffstat (limited to 'arch/alpha/include/uapi')
| -rw-r--r-- | arch/alpha/include/uapi/asm/ptrace.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/alpha/include/uapi/asm/ptrace.h b/arch/alpha/include/uapi/asm/ptrace.h index 9d86b2a1526e..72ed913a910f 100644 --- a/arch/alpha/include/uapi/asm/ptrace.h +++ b/arch/alpha/include/uapi/asm/ptrace.h @@ -43,7 +43,7 @@ struct pt_regs { unsigned long trap_a1; unsigned long trap_a2; /* This makes the stack 16-byte aligned as GCC expects */ - unsigned long usp; + unsigned long __pad0; /* These are saved by PAL-code: */ unsigned long ps; unsigned long pc; |