From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 22 Apr 2021 06:43:05 +0000 (+1000)
Subject: gcov: use kvmalloc()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8350543cefd73017d7aab9eee744d5f2fd83df32;p=users%2Fjedix%2Flinux-maple.git

gcov: use kvmalloc()

Using vmalloc() in gcov is really quite wasteful, many of the objects
allocated are really small (e.g.  I've seen 24 bytes.) Use kvmalloc() to
automatically pick the better of kmalloc() or vmalloc() depending on the
size.

Link: https://lkml.kernel.org/r/20210315235453.799e7a9d627d.I741d0db096c6f312910f7f1bcdfde0fda20801a4@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---

diff --git a/kernel/gcov/clang.c b/kernel/gcov/clang.c
index 1741c65b4fb2e..04a65443005d7 100644
--- a/kernel/gcov/clang.c
+++ b/kernel/gcov/clang.c
@@ -49,7 +49,7 @@
 #include <linux/printk.h>
 #include <linux/ratelimit.h>
 #include <linux/slab.h>
-#include <linux/vmalloc.h>
+#include <linux/mm.h>
 #include "gcov.h"
 
 typedef void (*llvm_gcov_callback)(void);
@@ -333,8 +333,8 @@ void gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
 static struct gcov_fn_info *gcov_fn_info_dup(struct gcov_fn_info *fn)
 {
 	size_t cv_size; /* counter values size */
-	struct gcov_fn_info *fn_dup = kmemdup(fn, sizeof(*fn),
-			GFP_KERNEL);
+	struct gcov_fn_info *fn_dup = kmemdup(fn, sizeof(*fn), GFP_KERNEL);
+
 	if (!fn_dup)
 		return NULL;
 	INIT_LIST_HEAD(&fn_dup->head);
@@ -344,7 +344,7 @@ static struct gcov_fn_info *gcov_fn_info_dup(struct gcov_fn_info *fn)
 		goto err_name;
 
 	cv_size = fn->num_counters * sizeof(fn->counters[0]);
-	fn_dup->counters = vmalloc(cv_size);
+	fn_dup->counters = kvmalloc(cv_size, GFP_KERNEL);
 	if (!fn_dup->counters)
 		goto err_counters;
 	memcpy(fn_dup->counters, fn->counters, cv_size);
@@ -439,7 +439,7 @@ void gcov_info_free(struct gcov_info *info)
 	struct gcov_fn_info *fn, *tmp;
 
 	list_for_each_entry_safe(fn, tmp, &info->functions, head) {
-		vfree(fn->counters);
+		kvfree(fn->counters);
 		list_del(&fn->head);
 		kfree(fn);
 	}
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c
index 40ea81c0475b5..5c3086cad8f99 100644
--- a/kernel/gcov/fs.c
+++ b/kernel/gcov/fs.c
@@ -26,7 +26,7 @@
 #include <linux/slab.h>
 #include <linux/mutex.h>
 #include <linux/seq_file.h>
-#include <linux/vmalloc.h>
+#include <linux/mm.h>
 #include "gcov.h"
 
 /**
@@ -116,7 +116,7 @@ static struct gcov_iterator *gcov_iter_new(struct gcov_info *info)
 	/* Dry-run to get the actual buffer size. */
 	size = convert_to_gcda(NULL, info);
 
-	iter = vmalloc(struct_size(iter, buffer, size));
+	iter = kvmalloc(struct_size(iter, buffer, size), GFP_KERNEL);
 	if (!iter)
 		return NULL;
 
@@ -134,7 +134,7 @@ static struct gcov_iterator *gcov_iter_new(struct gcov_info *info)
  */
 static void gcov_iter_free(struct gcov_iterator *iter)
 {
-	vfree(iter);
+	kvfree(iter);
 }
 
 /**
diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
index 1251f2434e907..460c12b7dfea2 100644
--- a/kernel/gcov/gcc_4_7.c
+++ b/kernel/gcov/gcc_4_7.c
@@ -15,7 +15,7 @@
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/vmalloc.h>
+#include <linux/mm.h>
 #include "gcov.h"
 
 #if (__GNUC__ >= 10)
@@ -309,7 +309,7 @@ struct gcov_info *gcov_info_dup(struct gcov_info *info)
 
 			cv_size = sizeof(gcov_type) * sci_ptr->num;
 
-			dci_ptr->values = vmalloc(cv_size);
+			dci_ptr->values = kvmalloc(cv_size, GFP_KERNEL);
 
 			if (!dci_ptr->values)
 				goto err_free;
@@ -351,7 +351,7 @@ void gcov_info_free(struct gcov_info *info)
 		ci_ptr = info->functions[fi_idx]->ctrs;
 
 		for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++)
-			vfree(ci_ptr->values);
+			kvfree(ci_ptr->values);
 
 		kfree(info->functions[fi_idx]);
 	}