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um: Remove unused mm_fd field from mm_id

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It's no longer used since the removal of the SKAS3/4 support.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Tiwei Bie 2024-08-26 18:08:12 +08:00 committed by Richard Weinberger
parent 94090f418f
commit 59376fb2a7
6 changed files with 11 additions and 14 deletions
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3
arch/um/include/shared/skas/mm_id.h
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@ -7,10 +7,7 @@
#define __MM_ID_H #define __MM_ID_H
struct mm_id { struct mm_id {
union {
int mm_fd;
int pid; int pid;
} u;
unsigned long stack; unsigned long stack;
int syscall_data_len; int syscall_data_len;
}; };

2
arch/um/kernel/reboot.c
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@ -29,7 +29,7 @@ static void kill_off_processes(void)
t = find_lock_task_mm(p); t = find_lock_task_mm(p);
if (!t) if (!t)
continue; continue;
pid = t->mm->context.id.u.pid; pid = t->mm->context.id.pid;
task_unlock(t); task_unlock(t);
os_kill_ptraced_process(pid, 1); os_kill_ptraced_process(pid, 1);
} }

12
arch/um/kernel/skas/mmu.c
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@ -32,11 +32,11 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
new_id->stack = stack; new_id->stack = stack;
block_signals_trace(); block_signals_trace();
new_id->u.pid = start_userspace(stack); new_id->pid = start_userspace(stack);
unblock_signals_trace(); unblock_signals_trace();
if (new_id->u.pid < 0) { if (new_id->pid < 0) {
ret = new_id->u.pid; ret = new_id->pid;
goto out_free; goto out_free;
} }
@ -83,12 +83,12 @@ void destroy_context(struct mm_struct *mm)
* whole UML suddenly dying. Also, cover negative and * whole UML suddenly dying. Also, cover negative and
* 1 cases, since they shouldn't happen either. * 1 cases, since they shouldn't happen either.
*/ */
if (mmu->id.u.pid < 2) { if (mmu->id.pid < 2) {
printk(KERN_ERR "corrupt mm_context - pid = %d\n", printk(KERN_ERR "corrupt mm_context - pid = %d\n",
mmu->id.u.pid); mmu->id.pid);
return; return;
} }
os_kill_ptraced_process(mmu->id.u.pid, 1); os_kill_ptraced_process(mmu->id.pid, 1);
free_pages(mmu->id.stack, ilog2(STUB_DATA_PAGES)); free_pages(mmu->id.stack, ilog2(STUB_DATA_PAGES));
} }

2
arch/um/kernel/time.c
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@ -839,7 +839,7 @@ static irqreturn_t um_timer(int irq, void *dev)
if (get_current()->mm != NULL) if (get_current()->mm != NULL)
{ {
/* userspace - relay signal, results in correct userspace timers */ /* userspace - relay signal, results in correct userspace timers */
os_alarm_process(get_current()->mm->context.id.u.pid); os_alarm_process(get_current()->mm->context.id.pid);
} }
(*timer_clockevent.event_handler)(&timer_clockevent); (*timer_clockevent.event_handler)(&timer_clockevent);

2
arch/um/os-Linux/skas/mem.c
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@ -78,7 +78,7 @@ static inline long do_syscall_stub(struct mm_id *mm_idp)
{ {
struct stub_data *proc_data = (void *)mm_idp->stack; struct stub_data *proc_data = (void *)mm_idp->stack;
int n, i; int n, i;
int err, pid = mm_idp->u.pid; int err, pid = mm_idp->pid;
n = ptrace_setregs(pid, syscall_regs); n = ptrace_setregs(pid, syscall_regs);
if (n < 0) { if (n < 0) {

2
arch/um/os-Linux/skas/process.c
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@ -588,5 +588,5 @@ void reboot_skas(void)
void __switch_mm(struct mm_id *mm_idp) void __switch_mm(struct mm_id *mm_idp)
{ {
userspace_pid[0] = mm_idp->u.pid; userspace_pid[0] = mm_idp->pid;
} }