The patch titled
sfi: fix section mismatch warnings in sfi_core.c
has been added to the -mm tree. Its filename is
sfi-fix-section-mismatch-warnings-in-sfi_corec.patch
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------------------------------------------------------
Subject: sfi: fix section mismatch warnings in sfi_core.c
From: Rakib Mullick <rakib.mullick@xxxxxxxxx>
The function sfi_map_memory/sfi_unmap_memory uses
early_ioremap/early_iounmap respectively, which refers to a __init
function. And function sfi_check_table also refers to a __init function
sfi_verify_table. Since the references are valid, so use __ref to get rid
of the warnings.
We were warned by the following warnings:
LD vmlinux.o
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0xb6ba3a): Section mismatch in reference from
the function sfi_map_memory() to the function
.init.text:early_ioremap()
The function sfi_map_memory() references
the function __init early_ioremap().
This is often because sfi_map_memory lacks a __init
annotation or the annotation of early_ioremap is wrong.
WARNING: vmlinux.o(.text+0xb6bab6): Section mismatch in reference from
the function sfi_unmap_memory() to the function
.init.text:early_iounmap()
The function sfi_unmap_memory() references
the function __init early_iounmap().
This is often because sfi_unmap_memory lacks a __init
annotation or the annotation of early_iounmap is wrong.
WARNING: vmlinux.o(.text+0xb6be30): Section mismatch in reference from
the function sfi_check_table() to the function
.init.text:sfi_verify_table()
The function sfi_check_table() references
the function __init sfi_verify_table().
This is often because sfi_check_table lacks a __init
annotation or the annotation of sfi_verify_table is wrong.
Signed-off-by: Rakib Mullick <rakib.mullick@xxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Feng Tang <feng.tang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/sfi/sfi_core.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff -puN drivers/sfi/sfi_core.c~sfi-fix-section-mismatch-warnings-in-sfi_corec drivers/sfi/sfi_core.c
--- a/drivers/sfi/sfi_core.c~sfi-fix-section-mismatch-warnings-in-sfi_corec
+++ a/drivers/sfi/sfi_core.c
@@ -90,7 +90,11 @@ static struct sfi_table_simple *syst_va
*/
static u32 sfi_use_ioremap __read_mostly;
-static void __iomem *sfi_map_memory(u64 phys, u32 size)
+/*
+ * sfi_un/map_memory calls early_ioremap/iounmap which is a __init function
+ * and introduces section mismatch. So use __ref to make it calm.
+ */
+static void __iomem * __ref sfi_map_memory(u64 phys, u32 size)
{
if (!phys || !size)
return NULL;
@@ -101,7 +105,7 @@ static void __iomem *sfi_map_memory(u64
return early_ioremap(phys, size);
}
-static void sfi_unmap_memory(void __iomem *virt, u32 size)
+static void __ref sfi_unmap_memory(void __iomem *virt, u32 size)
{
if (!virt || !size)
return;
@@ -213,12 +217,17 @@ static int sfi_table_check_key(struct sf
* the mapped virt address will be returned, and the virt space
* will be released by call sfi_put_table() later
*
+ * This two cases are from two different functions with two different
+ * sections and causes section mismatch warning. So use __ref to tell
+ * modpost not to make any noise.
+ *
* Return value:
* NULL: when can't find a table matching the key
* ERR_PTR(error): error value
* virt table address: when a matched table is found
*/
-struct sfi_table_header *sfi_check_table(u64 pa, struct sfi_table_key *key)
+struct sfi_table_header *
+ __ref sfi_check_table(u64 pa, struct sfi_table_key *key)
{
struct sfi_table_header *th;
void *ret = NULL;
_
Patches currently in -mm which might be from rakib.mullick@xxxxxxxxx are
linux-next.patch
sfi-fix-section-mismatch-warnings-in-sfi_corec.patch
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