[v2,04/13] powerpc: Prepare func_desc_t for refactorisation

Commit Message

Christophe Leroy Oct. 14, 2021, 5:49 a.m. UTC

In preparation of making func_desc_t generic, change it to
a struct containing 'addr' element.

In addition this allows using single helpers common to ELFv1 and ELFv2.

Signed-off-by: Christophe Leroy <[e-mail]>
---
 arch/powerpc/kernel/module_64.c | 34 +++++++++++++++------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

Patch

diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 82908c9be627..dc99a3f6cee2 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -33,19 +33,13 @@ 
 #ifdef PPC64_ELF_ABI_v2
 
 /* An address is simply the address of the function. */
-typedef unsigned long func_desc_t;
+typedef struct {
+	unsigned long addr;
+} func_desc_t;
 
 static func_desc_t func_desc(unsigned long addr)
 {
-	return addr;
-}
-static unsigned long func_addr(unsigned long addr)
-{
-	return addr;
-}
-static unsigned long stub_func_addr(func_desc_t func)
-{
-	return func;
+	return (func_desc_t){addr};
 }
 
 /* PowerPC64 specific values for the Elf64_Sym st_other field.  */
@@ -68,15 +62,7 @@  typedef struct ppc64_opd_entry func_desc_t;
 
 static func_desc_t func_desc(unsigned long addr)
 {
-	return *(struct ppc64_opd_entry *)addr;
-}
-static unsigned long func_addr(unsigned long addr)
-{
-	return func_desc(addr).addr;
-}
-static unsigned long stub_func_addr(func_desc_t func)
-{
-	return func.addr;
+	return *(func_desc_t *)addr;
 }
 static unsigned int local_entry_offset(const Elf64_Sym *sym)
 {
@@ -93,6 +79,16 @@  void *dereference_module_function_descriptor(struct module *mod, void *ptr)
 }
 #endif
 
+static unsigned long func_addr(unsigned long addr)
+{
+	return func_desc(addr).addr;
+}
+
+static unsigned long stub_func_addr(func_desc_t func)
+{
+	return func.addr;
+}
+
 #define STUB_MAGIC 0x73747562 /* stub */
 
 /* Like PPC32, we need little trampolines to do > 24-bit jumps (into