diff options
| author | Thomas Gleixner <tglx@kernel.org> | 2026-07-07 21:06:36 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-07-12 12:38:01 +0200 |
| commit | 8af25d0a2e465f3cb73c47c605fddd1664ee79b2 (patch) | |
| tree | 91b8b514f9ab0584cd57a33c60918174e775109f /include/linux | |
| parent | bad2a27ba8c4a6bd2c47e598898d9dbd0f98511f (diff) | |
entry: Use syscall number instead of rereading it
rseq_syscall_enter_work() is invoked before the syscall number can be
modified. So there is no point in rereading it from pt_regs.
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Radu Rendec <radu@rendec.net>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Link: https://patch.msgid.link/20260707190254.181086755@kernel.org
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/entry-common.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h index c0f6464ca96b..c8373525bdb1 100644 --- a/include/linux/entry-common.h +++ b/include/linux/entry-common.h @@ -70,9 +70,10 @@ static inline void syscall_enter_audit(struct pt_regs *regs, long syscall) } } -static __always_inline long syscall_trace_enter(struct pt_regs *regs, unsigned long work) +static __always_inline long syscall_trace_enter(struct pt_regs *regs, unsigned long work, + long syscall) { - long syscall, ret = 0; + long ret = 0; /* * Handle Syscall User Dispatch. This must comes first, since @@ -90,7 +91,7 @@ static __always_inline long syscall_trace_enter(struct pt_regs *regs, unsigned l * through hrtimer_interrupt(). */ if (work & SYSCALL_WORK_SYSCALL_RSEQ_SLICE) - rseq_syscall_enter_work(syscall_get_nr(current, regs)); + rseq_syscall_enter_work(syscall); /* Handle ptrace */ if (work & (SYSCALL_WORK_SYSCALL_TRACE | SYSCALL_WORK_SYSCALL_EMU)) { @@ -145,7 +146,7 @@ static __always_inline long syscall_enter_from_user_mode_work(struct pt_regs *re unsigned long work = READ_ONCE(current_thread_info()->syscall_work); if (work & SYSCALL_WORK_ENTER) - syscall = syscall_trace_enter(regs, work); + syscall = syscall_trace_enter(regs, work, syscall); return syscall; } |