ANDROID: f2fs: fixup ABI break due to reserved_pin_section

Take advantage of a hole in f2fs_sb_info to add reserved_pin_section
member and avoid an ABI break.

Bug: 428889879
Cc: Paul Lawrence <paullawrence@google.com>
Cc: Giuliano Procida <gprocida@google.com>
Cc: Todd Kjos <tkjos@google.com>
Fixes: 12727f8a4b ("FROMGIT: f2fs: introduce reserved_pin_section sysfs entry")
Change-Id: Id27596b073751d94bfefa0c2001b8933a4bed15c
Signed-off-by: Carlos Llamas <cmllamas@google.com>

fs/f2fs/f2fs.h

@@ -1713,11 +1713,12 @@ struct f2fs_sb_info {
 	/* for skip statistic */
 	unsigned long long skipped_gc_rwsem;		/* FG_GC only */
 
-	/* free sections reserved for pinned file */
-	unsigned int reserved_pin_section;
-
 	/* threshold for gc trials on pinned files */
 	unsigned short gc_pin_file_threshold;
+
+	/* free sections reserved for pinned file */
+	ANDROID_KABI_IGNORE(0, unsigned int reserved_pin_section);
+
 	struct f2fs_rwsem pin_sem;
 
 	/* maximum # of trials to find a victim segment for SSR and GC */

gki/aarch64/abi.stg

@@ -49875,6 +49875,11 @@ member {
   type_id: 0x63891ef9
   offset: 928
 }
+member {
+  id: 0x3b2a0ab9
+  type_id: 0x638666c6
+  offset: 20832
+}
 member {
   id: 0x3b320430
   type_id: 0x63e6543d
@@ -53953,6 +53958,11 @@ member {
   name: "__iov"
   type_id: 0x3ea6bd8c
 }
+member {
+  id: 0x936cb8af
+  name: "__kabi_ignored0"
+  type_id: 0x5d8155a5
+}
 member {
   id: 0x4140f02a
   name: "__kabi_reserved1"
@@ -207044,6 +207054,11 @@ member {
   type_id: 0x7584e7da
   offset: 32
 }
+member {
+  id: 0xd56180a7
+  name: "reserved_pin_section"
+  type_id: 0x4585663f
+}
 member {
   id: 0xcbc32f04
   name: "reserved_segments"
@@ -271263,6 +271278,15 @@ struct_union {
     member_id: 0x95dac977
   }
 }
+struct_union {
+  id: 0x638666c6
+  kind: UNION
+  definition {
+    bytesize: 4
+    member_id: 0xd56180a7
+    member_id: 0x936cb8af
+  }
+}
 struct_union {
   id: 0x63891ef9
   kind: UNION
@@ -303376,6 +303400,7 @@ struct_union {
     member_id: 0x8bdb6595
     member_id: 0x81b511b8
     member_id: 0x1f9d16da
+    member_id: 0x3b2a0ab9
     member_id: 0x22d5b74c
     member_id: 0xb05ca32a
     member_id: 0x57292a6b

gki/aarch64/abi.stg.allowed_breaks

@@ -7,3 +7,6 @@ type 'enum prs_errcode' changed
 type 'struct sched_dl_entity' changed
   member 'unsigned int dl_server_idle:1' was added
 
+type 'struct f2fs_sb_info' changed
+  member 'union { unsigned int reserved_pin_section; unsigned char __kabi_ignored0; }' was added
+