[tip:x86/mm] resource: Clean it up a bit
From: tip-bot for Borislav Petkov
Date: Tue Oct 09 2018 - 11:33:51 EST
Commit-ID: b69c2e20f6e4046da84ce5b33ba1ef89cb087b40
Gitweb: https://git.kernel.org/tip/b69c2e20f6e4046da84ce5b33ba1ef89cb087b40
Author: Borislav Petkov <bp@xxxxxxx>
AuthorDate: Tue, 9 Oct 2018 16:11:21 +0200
Committer: Borislav Petkov <bp@xxxxxxx>
CommitDate: Tue, 9 Oct 2018 17:25:58 +0200
resource: Clean it up a bit
- Drop BUG_ON()s and do normal error handling instead, in
find_next_iomem_res().
- Align function arguments on opening braces.
- Get rid of local var sibling_only in find_next_iomem_res().
- Shorten unnecessarily long first_level_children_only arg name.
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Brijesh Singh <brijesh.singh@xxxxxxx>
CC: Dan Williams <dan.j.williams@xxxxxxxxx>
CC: H. Peter Anvin <hpa@xxxxxxxxx>
CC: Lianbo Jiang <lijiang@xxxxxxxxxx>
CC: Takashi Iwai <tiwai@xxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Tom Lendacky <thomas.lendacky@xxxxxxx>
CC: Vivek Goyal <vgoyal@xxxxxxxxxx>
CC: Yaowei Bai <baiyaowei@xxxxxxxxxxxxxxxxxxxx>
CC: bhe@xxxxxxxxxx
CC: dan.j.williams@xxxxxxxxx
CC: dyoung@xxxxxxxxxx
CC: kexec@xxxxxxxxxxxxxxxxxxx
CC: mingo@xxxxxxxxxx
Link: <new submission>
---
kernel/resource.c | 55 ++++++++++++++++++++++++++-----------------------------
1 file changed, 26 insertions(+), 29 deletions(-)
diff --git a/kernel/resource.c b/kernel/resource.c
index 38b8d11c9eaf..b3a3a1fc499e 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -328,25 +328,23 @@ EXPORT_SYMBOL(release_resource);
* -1.
*
* This function walks the whole tree and not just first level children
- * unless @first_level_children_only is true.
+ * unless @first_lvl is true.
*/
static int find_next_iomem_res(resource_size_t start, resource_size_t end,
unsigned long flags, unsigned long desc,
- bool first_level_children_only,
- struct resource *res)
+ bool first_lvl, struct resource *res)
{
struct resource *p;
- bool sibling_only = false;
- BUG_ON(!res);
- BUG_ON(start >= end);
+ if (!res)
+ return -EINVAL;
- if (first_level_children_only)
- sibling_only = true;
+ if (start >= end)
+ return -EINVAL;
read_lock(&resource_lock);
- for (p = iomem_resource.child; p; p = next_resource(p, sibling_only)) {
+ for (p = iomem_resource.child; p; p = next_resource(p, first_lvl)) {
if ((p->flags & flags) != flags)
continue;
if ((desc != IORES_DESC_NONE) && (desc != p->desc))
@@ -373,15 +371,14 @@ static int find_next_iomem_res(resource_size_t start, resource_size_t end,
static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
unsigned long flags, unsigned long desc,
- bool first_level_children_only, void *arg,
+ bool first_lvl, void *arg,
int (*func)(struct resource *, void *))
{
struct resource res;
int ret = -1;
while (start < end &&
- !find_next_iomem_res(start, end, flags, desc,
- first_level_children_only, &res)) {
+ !find_next_iomem_res(start, end, flags, desc, first_lvl, &res)) {
ret = (*func)(&res, arg);
if (ret)
break;
@@ -392,7 +389,7 @@ static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
return ret;
}
-/*
+/**
* Walks through iomem resources and calls func() with matching resource
* ranges. This walks through whole tree and not just first level children.
* All the memory ranges which overlap start,end and also match flags and
@@ -421,7 +418,7 @@ EXPORT_SYMBOL_GPL(walk_iomem_res_desc);
* ranges.
*/
int walk_system_ram_res(u64 start, u64 end, void *arg,
- int (*func)(struct resource *, void *))
+ int (*func)(struct resource *, void *))
{
unsigned long flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
@@ -450,7 +447,7 @@ int walk_mem_res(u64 start, u64 end, void *arg,
* It is to be used only for System RAM.
*/
int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
- void *arg, int (*func)(unsigned long, unsigned long, void *))
+ void *arg, int (*func)(unsigned long, unsigned long, void *))
{
resource_size_t start, end;
unsigned long flags;
@@ -646,8 +643,8 @@ static int find_resource(struct resource *root, struct resource *new,
* @constraint: the size and alignment constraints to be met.
*/
static int reallocate_resource(struct resource *root, struct resource *old,
- resource_size_t newsize,
- struct resource_constraint *constraint)
+ resource_size_t newsize,
+ struct resource_constraint *constraint)
{
int err=0;
struct resource new = *old;
@@ -960,7 +957,7 @@ skip:
* Existing children of the resource are assumed to be immutable.
*/
int adjust_resource(struct resource *res, resource_size_t start,
- resource_size_t size)
+ resource_size_t size)
{
int result;
@@ -971,9 +968,9 @@ int adjust_resource(struct resource *res, resource_size_t start,
}
EXPORT_SYMBOL(adjust_resource);
-static void __init __reserve_region_with_split(struct resource *root,
- resource_size_t start, resource_size_t end,
- const char *name)
+static void __init
+__reserve_region_with_split(struct resource *root, resource_size_t start,
+ resource_size_t end, const char *name)
{
struct resource *parent = root;
struct resource *conflict;
@@ -1032,9 +1029,9 @@ static void __init __reserve_region_with_split(struct resource *root,
}
-void __init reserve_region_with_split(struct resource *root,
- resource_size_t start, resource_size_t end,
- const char *name)
+void __init
+reserve_region_with_split(struct resource *root, resource_size_t start,
+ resource_size_t end, const char *name)
{
int abort = 0;
@@ -1160,7 +1157,7 @@ EXPORT_SYMBOL(__request_region);
* The described resource region must match a currently busy region.
*/
void __release_region(struct resource *parent, resource_size_t start,
- resource_size_t n)
+ resource_size_t n)
{
struct resource **p;
resource_size_t end;
@@ -1222,7 +1219,7 @@ EXPORT_SYMBOL(__release_region);
* simplicity. Enhance this logic when necessary.
*/
int release_mem_region_adjustable(struct resource *parent,
- resource_size_t start, resource_size_t size)
+ resource_size_t start, resource_size_t size)
{
struct resource **p;
struct resource *res;
@@ -1398,9 +1395,9 @@ static int devm_region_match(struct device *dev, void *res, void *match_data)
this->start == match->start && this->n == match->n;
}
-struct resource * __devm_request_region(struct device *dev,
- struct resource *parent, resource_size_t start,
- resource_size_t n, const char *name)
+struct resource *
+__devm_request_region(struct device *dev, struct resource *parent,
+ resource_size_t start, resource_size_t n, const char *name)
{
struct region_devres *dr = NULL;
struct resource *res;