[patch 08/86] fs/proc/internal.h: shuffle "struct pde_opener"

Andrew Morton
2019-12-05T00:50:08Z

From: Alexey Dobriyan <adobriyan@gmail.com>
Subject: fs/proc/internal.h: shuffle "struct pde_opener"

List iteration takes more code than anything else which means embedded
list_head should be the first element of the structure.

Space savings:

add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-18 (-18)
Function old new delta
close_pdeo 228 227 -1
proc_reg_release 86 82 -4
proc_entry_rundown 143 139 -4
proc_reg_open 298 289 -9

Link: http://lkml.kernel.org/r/20191004234753.GB30246@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

fs/proc/internal.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/proc/internal.h~proc-shuffle-struct-pde_opener
+++ a/fs/proc/internal.h
@@ -197,8 +197,8 @@ extern ssize_t proc_simple_write(struct
* inode.c
*/
struct pde_opener {
- struct file *file;
struct list_head lh;
+ struct file *file;
bool closing;
struct completion *c;
} __randomize_layout;
_