scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 212 insertions, 0 deletions

diff --git a/rust/syn/precedence.rs b/rust/syn/precedence.rs
new file mode 100644
index 000000000..cc4dba24a
--- /dev/null
+++ b/rust/syn/precedence.rs
@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+#[cfg(all(feature = "printing", feature = "full"))]
+use crate::attr::{AttrStyle, Attribute};
+#[cfg(feature = "printing")]
+use crate::expr::Expr;
+#[cfg(all(feature = "printing", feature = "full"))]
+use crate::expr::{
+    ExprArray, ExprAsync, ExprAwait, ExprBlock, ExprBreak, ExprCall, ExprConst, ExprContinue,
+    ExprField, ExprForLoop, ExprGroup, ExprIf, ExprIndex, ExprInfer, ExprLit, ExprLoop, ExprMacro,
+    ExprMatch, ExprMethodCall, ExprParen, ExprPath, ExprRepeat, ExprReturn, ExprStruct, ExprTry,
+    ExprTryBlock, ExprTuple, ExprUnsafe, ExprWhile, ExprYield,
+};
+use crate::op::BinOp;
+#[cfg(all(feature = "printing", feature = "full"))]
+use crate::ty::ReturnType;
+use std::cmp::Ordering;
+
+// Reference: https://doc.rust-lang.org/reference/expressions.html#expression-precedence
+pub(crate) enum Precedence {
+    // return, break, closures
+    Jump,
+    // = += -= *= /= %= &= |= ^= <<= >>=
+    Assign,
+    // .. ..=
+    Range,
+    // ||
+    Or,
+    // &&
+    And,
+    // let
+    #[cfg(feature = "printing")]
+    Let,
+    // == != < > <= >=
+    Compare,
+    // |
+    BitOr,
+    // ^
+    BitXor,
+    // &
+    BitAnd,
+    // << >>
+    Shift,
+    // + -
+    Sum,
+    // * / %
+    Product,
+    // as
+    Cast,
+    // unary - * ! & &mut
+    #[cfg(feature = "printing")]
+    Prefix,
+    // paths, loops, function calls, array indexing, field expressions, method calls
+    #[cfg(feature = "printing")]
+    Unambiguous,
+}
+
+impl Precedence {
+    pub(crate) const MIN: Self = Precedence::Jump;
+
+    pub(crate) fn of_binop(op: &BinOp) -> Self {
+        match op {
+            BinOp::Add(_) | BinOp::Sub(_) => Precedence::Sum,
+            BinOp::Mul(_) | BinOp::Div(_) | BinOp::Rem(_) => Precedence::Product,
+            BinOp::And(_) => Precedence::And,
+            BinOp::Or(_) => Precedence::Or,
+            BinOp::BitXor(_) => Precedence::BitXor,
+            BinOp::BitAnd(_) => Precedence::BitAnd,
+            BinOp::BitOr(_) => Precedence::BitOr,
+            BinOp::Shl(_) | BinOp::Shr(_) => Precedence::Shift,
+
+            BinOp::Eq(_)
+            | BinOp::Lt(_)
+            | BinOp::Le(_)
+            | BinOp::Ne(_)
+            | BinOp::Ge(_)
+            | BinOp::Gt(_) => Precedence::Compare,
+
+            BinOp::AddAssign(_)
+            | BinOp::SubAssign(_)
+            | BinOp::MulAssign(_)
+            | BinOp::DivAssign(_)
+            | BinOp::RemAssign(_)
+            | BinOp::BitXorAssign(_)
+            | BinOp::BitAndAssign(_)
+            | BinOp::BitOrAssign(_)
+            | BinOp::ShlAssign(_)
+            | BinOp::ShrAssign(_) => Precedence::Assign,
+        }
+    }
+
+    #[cfg(feature = "printing")]
+    pub(crate) fn of(e: &Expr) -> Self {
+        #[cfg(feature = "full")]
+        fn prefix_attrs(attrs: &[Attribute]) -> Precedence {
+            for attr in attrs {
+                if let AttrStyle::Outer = attr.style {
+                    return Precedence::Prefix;
+                }
+            }
+            Precedence::Unambiguous
+        }
+
+        match e {
+            #[cfg(feature = "full")]
+            Expr::Closure(e) => match e.output {
+                ReturnType::Default => Precedence::Jump,
+                ReturnType::Type(..) => prefix_attrs(&e.attrs),
+            },
+
+            #[cfg(feature = "full")]
+            Expr::Break(ExprBreak { expr, .. })
+            | Expr::Return(ExprReturn { expr, .. })
+            | Expr::Yield(ExprYield { expr, .. }) => match expr {
+                Some(_) => Precedence::Jump,
+                None => Precedence::Unambiguous,
+            },
+
+            Expr::Assign(_) => Precedence::Assign,
+            Expr::Range(_) => Precedence::Range,
+            Expr::Binary(e) => Precedence::of_binop(&e.op),
+            Expr::Let(_) => Precedence::Let,
+            Expr::Cast(_) => Precedence::Cast,
+            Expr::RawAddr(_) | Expr::Reference(_) | Expr::Unary(_) => Precedence::Prefix,
+
+            #[cfg(feature = "full")]
+            Expr::Array(ExprArray { attrs, .. })
+            | Expr::Async(ExprAsync { attrs, .. })
+            | Expr::Await(ExprAwait { attrs, .. })
+            | Expr::Block(ExprBlock { attrs, .. })
+            | Expr::Call(ExprCall { attrs, .. })
+            | Expr::Const(ExprConst { attrs, .. })
+            | Expr::Continue(ExprContinue { attrs, .. })
+            | Expr::Field(ExprField { attrs, .. })
+            | Expr::ForLoop(ExprForLoop { attrs, .. })
+            | Expr::Group(ExprGroup { attrs, .. })
+            | Expr::If(ExprIf { attrs, .. })
+            | Expr::Index(ExprIndex { attrs, .. })
+            | Expr::Infer(ExprInfer { attrs, .. })
+            | Expr::Lit(ExprLit { attrs, .. })
+            | Expr::Loop(ExprLoop { attrs, .. })
+            | Expr::Macro(ExprMacro { attrs, .. })
+            | Expr::Match(ExprMatch { attrs, .. })
+            | Expr::MethodCall(ExprMethodCall { attrs, .. })
+            | Expr::Paren(ExprParen { attrs, .. })
+            | Expr::Path(ExprPath { attrs, .. })
+            | Expr::Repeat(ExprRepeat { attrs, .. })
+            | Expr::Struct(ExprStruct { attrs, .. })
+            | Expr::Try(ExprTry { attrs, .. })
+            | Expr::TryBlock(ExprTryBlock { attrs, .. })
+            | Expr::Tuple(ExprTuple { attrs, .. })
+            | Expr::Unsafe(ExprUnsafe { attrs, .. })
+            | Expr::While(ExprWhile { attrs, .. }) => prefix_attrs(attrs),
+
+            #[cfg(not(feature = "full"))]
+            Expr::Array(_)
+            | Expr::Async(_)
+            | Expr::Await(_)
+            | Expr::Block(_)
+            | Expr::Call(_)
+            | Expr::Const(_)
+            | Expr::Continue(_)
+            | Expr::Field(_)
+            | Expr::ForLoop(_)
+            | Expr::Group(_)
+            | Expr::If(_)
+            | Expr::Index(_)
+            | Expr::Infer(_)
+            | Expr::Lit(_)
+            | Expr::Loop(_)
+            | Expr::Macro(_)
+            | Expr::Match(_)
+            | Expr::MethodCall(_)
+            | Expr::Paren(_)
+            | Expr::Path(_)
+            | Expr::Repeat(_)
+            | Expr::Struct(_)
+            | Expr::Try(_)
+            | Expr::TryBlock(_)
+            | Expr::Tuple(_)
+            | Expr::Unsafe(_)
+            | Expr::While(_) => Precedence::Unambiguous,
+
+            Expr::Verbatim(_) => Precedence::Unambiguous,
+
+            #[cfg(not(feature = "full"))]
+            Expr::Break(_) | Expr::Closure(_) | Expr::Return(_) | Expr::Yield(_) => unreachable!(),
+        }
+    }
+}
+
+impl Copy for Precedence {}
+
+impl Clone for Precedence {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+impl PartialEq for Precedence {
+    fn eq(&self, other: &Self) -> bool {
+        *self as u8 == *other as u8
+    }
+}
+
+impl PartialOrd for Precedence {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        let this = *self as u8;
+        let other = *other as u8;
+        Some(this.cmp(&other))
+    }
+}