Remove PROC_CHECK_PRIV macro from sys_process.c

Just put the priv_check calls in the code.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D56864

sys/kern/sys_process.c

@@ -72,13 +72,6 @@
 /* Assert it's safe to unlock a process, e.g. to allocate working memory */
 #define	PROC_ASSERT_TRACEREQ(p)	MPASS(((p)->p_flag2 & P2_PTRACEREQ) != 0)
 
-#define PROC_PRIV_CHECK(priv) do {	 			\
-		int _error;					\
-		_error = priv_check(curthread, priv);	\
-		if (_error)					\
-			return (_error);			\
-	} while (0)
-
 /*
  * Functions implemented below:
  *
@@ -115,8 +108,12 @@ proc_read_regs(struct thread *td, struct reg *regs)
 int
 proc_write_regs(struct thread *td, struct reg *regs)
 {
+	int error;
+
 	PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 	return (set_regs(td, regs));
 }
 
@@ -130,8 +127,12 @@ proc_read_dbregs(struct thread *td, struct dbreg *dbregs)
 int
 proc_write_dbregs(struct thread *td, struct dbreg *dbregs)
 {
+	int error;
+
 	PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 	return (set_dbregs(td, dbregs));
 }
 
@@ -149,8 +150,12 @@ proc_read_fpregs(struct thread *td, struct fpreg *fpregs)
 int
 proc_write_fpregs(struct thread *td, struct fpreg *fpregs)
 {
+	int error;
+
 	PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 	return (set_fpregs(td, fpregs));
 }
 
@@ -271,7 +276,9 @@ proc_write_regset(struct thread *td, int note, struct iovec *iov)
 	if (regset->set == NULL)
 		return (EINVAL);
 
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 
 	p = td->td_proc;
 
@@ -305,8 +312,12 @@ proc_read_regs32(struct thread *td, struct reg32 *regs32)
 int
 proc_write_regs32(struct thread *td, struct reg32 *regs32)
 {
+	int error;
+
 	PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 	return (set_regs32(td, regs32));
 }
 
@@ -320,8 +331,12 @@ proc_read_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
 int
 proc_write_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
 {
+	int error;
+
 	PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 	return (set_dbregs32(td, dbregs32));
 }
 
@@ -335,8 +350,12 @@ proc_read_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
 int
 proc_write_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
 {
+	int error;
+
 	PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
-	PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+	error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+	if (error != 0)
+		return (error);
 	return (set_fpregs32(td, fpregs32));
 }
 #endif
@@ -378,7 +397,9 @@ proc_rwmem(struct proc *p, struct uio *uio)
 	fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL;
 
 	if (writing) {
-		PROC_PRIV_CHECK(PRIV_PROC_MEM_WRITE);
+		error = priv_check(curthread, PRIV_PROC_MEM_WRITE);
+		if (error != 0)
+			return (error);
 	}
 
 	/*
@@ -710,11 +731,11 @@ sys_ptrace(struct thread *td, struct ptrace_args *uap)
 		addr = uap->addr;
 		break;
 	}
-	if (error)
+	if (error != 0)
 		return (error);
 
 	error = kern_ptrace(td, uap->req, uap->pid, addr, uap->data);
-	if (error)
+	if (error != 0)
 		return (error);
 
 	switch (uap->req) {
@@ -1250,7 +1271,7 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
 			CTR3(KTR_PTRACE, "PT_STEP: tid %d (pid %d), sig = %d",
 			    td2->td_tid, p->p_pid, data);
 			error = ptrace_single_step(td2);
-			if (error)
+			if (error != 0)
 				goto out;
 			break;
 		case PT_CONTINUE:
@@ -1260,7 +1281,7 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
 			if (addr != (void *)1) {
 				error = ptrace_set_pc(td2,
 				    (u_long)(uintfptr_t)addr);
-				if (error)
+				if (error != 0)
 					goto out;
 				td2->td_dbgflags |= TDB_USERWR;
 			}