read-cache: use istate->repo for trace2 logging

trace2 calls in read-cache.c use the global 'the_repository',
even though the relevant index_state provides an explicit
repository pointer via 'istate->repo'.

Using the global repository can result in incorrect trace2
output when multiple repository instances are in use, as
events may be attributed to the wrong repository.

Use 'istate->repo' instead to ensure correct repository
attribution.

Signed-off-by: Jayesh Daga <jayeshdaga99@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: jayesh0104

read-cache.c

@@ -2309,13 +2309,9 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist)
 	}
 	munmap((void *)mmap, mmap_size);
 
-	/*
-	 * TODO trace2: replace "the_repository" with the actual repo instance
-	 * that is associated with the given "istate".
-	 */
-	trace2_data_intmax("index", the_repository, "read/version",
+	trace2_data_intmax("index", istate->repo, "read/version",
 			   istate->version);
-	trace2_data_intmax("index", the_repository, "read/cache_nr",
+	trace2_data_intmax("index", istate->repo, "read/cache_nr",
 			   istate->cache_nr);
 
 	/*
@@ -2360,16 +2356,12 @@ int read_index_from(struct index_state *istate, const char *path,
 	if (istate->initialized)
 		return istate->cache_nr;
 
-	/*
-	 * TODO trace2: replace "the_repository" with the actual repo instance
-	 * that is associated with the given "istate".
-	 */
-	trace2_region_enter_printf("index", "do_read_index", the_repository,
+	trace2_region_enter_printf("index", "do_read_index", istate->repo,
 				   "%s", path);
 	trace_performance_enter();
 	ret = do_read_index(istate, path, 0);
 	trace_performance_leave("read cache %s", path);
-	trace2_region_leave_printf("index", "do_read_index", the_repository,
+	trace2_region_leave_printf("index", "do_read_index", istate->repo,
 				   "%s", path);
 
 	split_index = istate->split_index;
@@ -3096,13 +3088,9 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
 	istate->timestamp.nsec = ST_MTIME_NSEC(st);
 	trace_performance_since(start, "write index, changed mask = %x", istate->cache_changed);
 
-	/*
-	 * TODO trace2: replace "the_repository" with the actual repo instance
-	 * that is associated with the given "istate".
-	 */
-	trace2_data_intmax("index", the_repository, "write/version",
+	trace2_data_intmax("index", istate->repo, "write/version",
 			   istate->version);
-	trace2_data_intmax("index", the_repository, "write/cache_nr",
+	trace2_data_intmax("index", istate->repo, "write/cache_nr",
 			   istate->cache_nr);
 
 	ret = 0;
@@ -3144,14 +3132,10 @@ static int do_write_locked_index(struct index_state *istate,
 		return ret;
 	}
 
-	/*
-	 * TODO trace2: replace "the_repository" with the actual repo instance
-	 * that is associated with the given "istate".
-	 */
-	trace2_region_enter_printf("index", "do_write_index", the_repository,
+	trace2_region_enter_printf("index", "do_write_index", istate->repo,
 				   "%s", get_lock_file_path(lock));
 	ret = do_write_index(istate, lock->tempfile, write_extensions, flags);
-	trace2_region_leave_printf("index", "do_write_index", the_repository,
+	trace2_region_leave_printf("index", "do_write_index", istate->repo,
 				   "%s", get_lock_file_path(lock));
 
 	if (was_full)