linux-kernel - [PATCH v2 RESEND 03/18] acpi: Remove "continue" in macro INVALID

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Message-Id: <1375434877-20704-4-git-send-email-tangchen@cn.fujitsu.com>
Date:	Fri, 2 Aug 2013 17:14:22 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	robert.moore@...el.com, lv.zheng@...el.com, rjw@...k.pl,
	lenb@...nel.org, tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	izumi.taku@...fujitsu.com, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	zhangyanfei@...fujitsu.com, yanghy@...fujitsu.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH v2 RESEND 03/18] acpi: Remove "continue" in macro INVALID_TABLE().

The macro INVALID_TABLE() is defined like this:

 #define INVALID_TABLE(x, path, name)                                    \
         { pr_err("ACPI OVERRIDE: " x " [%s%s]\n", path, name); continue; }

And it is used like this:

	for (...) {
		...
		if (...)
			INVALID_TABLE()
		...
	}

The "continue" in the macro makes the code hard to understand.
Change it to the style like other macros:

 #define INVALID_TABLE(x, path, name)                                    \
         do { pr_err("ACPI OVERRIDE: " x " [%s%s]\n", path, name); } while (0)

And also, INVALID_TABLE() is used to checkout acpi tables, so rename it to
ACPI_INVALID_TABLE(). This is suggested by Toshi Kani <toshi.kani@...com>.

So after this patch, this macro should be used like this:

	for (...) {
		...
		if (...) {
			ACPI_INVALID_TABLE()
			continue;
		}
		...
	}

Add the "continue" wherever the macro is called.
(For now, it is only called in acpi_initrd_override().)

The idea is from Yinghai Lu <yinghai@...nel.org>.

Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Acked-by: Tejun Heo <tj@...nel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Acked-by: Toshi Kani <toshi.kani@...com>
Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>
---
 drivers/acpi/osl.c |   28 ++++++++++++++++++----------
 1 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 6ab2c35..3b8bab2 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -564,8 +564,8 @@ static const char * const table_sigs[] = {
 	ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
 
 /* Non-fatal errors: Affected tables/files are ignored */
-#define INVALID_TABLE(x, path, name)					\
-	{ pr_err("ACPI OVERRIDE: " x " [%s%s]\n", path, name); continue; }
+#define ACPI_INVALID_TABLE(x, path, name)					\
+	do { pr_err("ACPI OVERRIDE: " x " [%s%s]\n", path, name); } while (0)
 
 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
 
@@ -593,9 +593,11 @@ void __init acpi_initrd_override(void *data, size_t size)
 		data += offset;
 		size -= offset;
 
-		if (file.size < sizeof(struct acpi_table_header))
-			INVALID_TABLE("Table smaller than ACPI header",
+		if (file.size < sizeof(struct acpi_table_header)) {
+			ACPI_INVALID_TABLE("Table smaller than ACPI header",
 				      cpio_path, file.name);
+			continue;
+		}
 
 		table = file.data;
 
@@ -603,15 +605,21 @@ void __init acpi_initrd_override(void *data, size_t size)
 			if (!memcmp(table->signature, table_sigs[sig], 4))
 				break;
 
-		if (!table_sigs[sig])
-			INVALID_TABLE("Unknown signature",
+		if (!table_sigs[sig]) {
+			ACPI_INVALID_TABLE("Unknown signature",
 				      cpio_path, file.name);
-		if (file.size != table->length)
-			INVALID_TABLE("File length does not match table length",
+			continue;
+		}
+		if (file.size != table->length) {
+			ACPI_INVALID_TABLE("File length does not match table length",
 				      cpio_path, file.name);
-		if (acpi_table_checksum(file.data, table->length))
-			INVALID_TABLE("Bad table checksum",
+			continue;
+		}
+		if (acpi_table_checksum(file.data, table->length)) {
+			ACPI_INVALID_TABLE("Bad table checksum",
 				      cpio_path, file.name);
+			continue;
+		}
 
 		pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
 			table->signature, cpio_path, file.name, table->length);
-- 
1.7.1

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