History

tracing: Propagate is_signed to expression

During expression parsing, a new expression field is created which should inherit the properties of the operands, such as size and is_signed. is_signed propagation was missing, causing spurious errors with signed operands. Add it in parse_expr() and parse_unary() to fix the problem. Link: https://lkml.kernel.org/r/f4dac08742fd7a0920bf80a73c6c44042f5eaa40.1643319703.git.zanussi@kernel.org

Tom Zanussi committed 4 years ago

Commit 097f1ee1 parent b59f2f21 file · +3 −0Browse files

Showing the changes to kernel (1 of 1 file). Show all

Unified · Split

kernel/trace/trace_events_hist.c+3−0
@@ -2503,6 +2503,8 @@ static struct hist_field *parse_unary(struct hist_trigger_data *hist_data, · 2502 unmodified lines
25032503 (HIST_FIELD_FL_TIMESTAMP | HIST_FIELD_FL_TIMESTAMP_USECS);
25042504 expr->fn = hist_field_unary_minus;
25052505 expr->operands[0] = operand1;
2506+ expr->size = operand1->size;
2507+ expr->is_signed = operand1->is_signed;
25062508 expr->operator = FIELD_OP_UNARY_MINUS;
25072509 expr->name = expr_str(expr, 0);
25082510 expr->type = kstrdup_const(operand1->type, GFP_KERNEL);
@@ -2719,6 +2721,7 @@ static struct hist_field *parse_expr(struct hist_trigger_data *hist_data, · 210 unmodified lines
27192721
27202722 /* The operand sizes should be the same, so just pick one */
27212723 expr->size = operand1->size;
2724+ expr->is_signed = operand1->is_signed;
27222725
27232726 expr->operator = field_op;
27242727 expr->type = kstrdup_const(operand1->type, GFP_KERNEL);