linux-kernel - [PATCH 5/8] lib: bitmap_getnum: separate arg into region and field

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Date:   Tue, 26 Jan 2021 12:11:38 -0500
From:   Paul Gortmaker <paul.gortmaker@...driver.com>
To:     linux-kernel@...r.kernel.org
Cc:     lizefan@...wei.com, mingo@...nel.org, tglx@...utronix.de,
        josh@...htriplett.org, yury.norov@...il.com, peterz@...radead.org,
        paulmck@...nel.org, fweisbec@...il.com, linux@...musvillemoes.dk,
        andriy.shevchenko@...ux.intel.com,
        Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [PATCH 5/8] lib: bitmap_getnum: separate arg into region and field

The bitmap_getnum is only used on a region's start/end/off/group_len
field.  Trivially decouple the region from the field so that the region
pointer is available for a pending change.

Cc: Yury Norov <yury.norov@...il.com>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 lib/bitmap.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/bitmap.c b/lib/bitmap.c
index 833f152a2c43..f65be2f148fd 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -533,6 +533,7 @@ static const char *bitmap_getnum(const char *str, unsigned int *num)
 	*num = n;
 	return str + len;
 }
+#define bitmap_getrnum(s, r, pos) bitmap_getnum(s, &(r->pos))
 
 static inline bool end_of_str(char c)
 {
@@ -571,7 +572,7 @@ static const char *bitmap_find_region_reverse(const char *start, const char *end
 
 static const char *bitmap_parse_region(const char *str, struct region *r)
 {
-	str = bitmap_getnum(str, &r->start);
+	str = bitmap_getrnum(str, r, start);
 	if (IS_ERR(str))
 		return str;
 
@@ -581,7 +582,7 @@ static const char *bitmap_parse_region(const char *str, struct region *r)
 	if (*str != '-')
 		return ERR_PTR(-EINVAL);
 
-	str = bitmap_getnum(str + 1, &r->end);
+	str = bitmap_getrnum(str + 1, r, end);
 	if (IS_ERR(str))
 		return str;
 
@@ -591,14 +592,14 @@ static const char *bitmap_parse_region(const char *str, struct region *r)
 	if (*str != ':')
 		return ERR_PTR(-EINVAL);
 
-	str = bitmap_getnum(str + 1, &r->off);
+	str = bitmap_getrnum(str + 1, r, off);
 	if (IS_ERR(str))
 		return str;
 
 	if (*str != '/')
 		return ERR_PTR(-EINVAL);
 
-	return bitmap_getnum(str + 1, &r->group_len);
+	return bitmap_getrnum(str + 1, r, group_len);
 
 no_end:
 	r->end = r->start;
-- 
2.17.1