Commit c2b1a922 authored by Leonardo Bras's avatar Leonardo Bras Committed by Masahiro Yamada
Browse files

modpost: Create macro to avoid variable shadowing 



Create DEF_FIELD_ADDR_VAR as a more generic version of the DEF_FIELD_ADD
macro, allowing usage of a variable name other than the struct element name.
Also, sets DEF_FIELD_ADDR as a specific usage of DEF_FILD_ADDR_VAR in which
the var name is the same as the struct element name.
Then, makes use of DEF_FIELD_ADDR_VAR to create a variable of another name,
in order to avoid variable shadowing.

Signed-off-by: default avatarLeonardo Bras <leobras.c@gmail.com>
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
parent 9e1e8194

scripts/mod/file2alias.c

+15 −4
Original line number Diff line number Diff line
@@ -95,12 +95,20 @@ extern struct devtable *__start___devtable[], *__stop___devtable[]; 
 */

#define DEF_FIELD(m, devid, f) \

	typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))



/* Define a variable v that holds the address of field f of struct devid

 * based at address m.  Due to the way typeof works, for a field of type

 * T[N] the variable has type T(*)[N], _not_ T*.

 */

#define DEF_FIELD_ADDR_VAR(m, devid, f, v) \

	typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)



/* Define a variable f that holds the address of field f of struct devid

 * based at address m.  Due to the way typeof works, for a field of type

 * T[N] the variable has type T(*)[N], _not_ T*.

 */

#define DEF_FIELD_ADDR(m, devid, f) \

	typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)

	DEF_FIELD_ADDR_VAR(m, devid, f, f)



/* Add a table entry.  We test function type matches while we're here. */

#define ADD_TO_DEVTABLE(device_id, type, function) \
@@ -656,10 +664,13 @@ static void do_pnp_card_entries(void *symval, unsigned long size, 


			/* find duplicate, already added value */

			for (i2 = 0; i2 < i && !dup; i2++) {

				DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);

				DEF_FIELD_ADDR_VAR(symval + i2 * id_size,

						   pnp_card_device_id,

						   devs, devs_dup);



				for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {

					const char *id2 = (char *)(*devs)[j2].id;

					const char *id2 =

						(char *)(*devs_dup)[j2].id;



					if (!id2[0])

						break;

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