coredump: reflow dump helpers a little

JIRA: https://issues.redhat.com/browse/RHEL-113598

commit 1c587ee
Author: Christian Brauner <brauner@kernel.org>
Date:   Fri, 16 May 2025 13:25:30 +0200

    coredump: reflow dump helpers a little

    They look rather messy right now.

    Link: https://lore.kernel.org/20250516-work-coredump-socket-v8-3-664f3caf2516@kernel.org
    Acked-by: Luca Boccassi <luca.boccassi@gmail.com>
    Reviewed-by: Jann Horn <jannh@google.com>
    Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
    Signed-off-by: Christian Brauner <brauner@kernel.org>

Signed-off-by: Waiman Long <longman@redhat.com>

Author: Waiman-Long

fs/coredump.c

@@ -864,10 +864,9 @@ static int __dump_emit(struct coredump_params *cprm, const void *addr, int nr)
 	struct file *file = cprm->file;
 	loff_t pos = file->f_pos;
 	ssize_t n;
+
 	if (cprm->written + nr > cprm->limit)
 		return 0;
-
-
 	if (dump_interrupted())
 		return 0;
 	n = __kernel_write(file, addr, nr, &pos);
@@ -884,20 +883,21 @@ static int __dump_skip(struct coredump_params *cprm, size_t nr)
 {
 	static char zeroes[PAGE_SIZE];
 	struct file *file = cprm->file;
+
 	if (file->f_mode & FMODE_LSEEK) {
-		if (dump_interrupted() ||
-		    vfs_llseek(file, nr, SEEK_CUR) < 0)
+		if (dump_interrupted() || vfs_llseek(file, nr, SEEK_CUR) < 0)
 			return 0;
 		cprm->pos += nr;
 		return 1;
-	} else {
-		while (nr > PAGE_SIZE) {
-			if (!__dump_emit(cprm, zeroes, PAGE_SIZE))
-				return 0;
-			nr -= PAGE_SIZE;
-		}
-		return __dump_emit(cprm, zeroes, nr);
 	}
+
+	while (nr > PAGE_SIZE) {
+		if (!__dump_emit(cprm, zeroes, PAGE_SIZE))
+			return 0;
+		nr -= PAGE_SIZE;
+	}
+
+	return __dump_emit(cprm, zeroes, nr);
 }
 
 int dump_emit(struct coredump_params *cprm, const void *addr, int nr)