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mfd: core: Reorder fields in 'struct mfd_cell' to save some memory

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Group some variables based on their sizes to reduce hole and avoid padding.
On x86_64, this shrinks the size from 144 to 128 bytes.

As an example:

$ size drivers/mfd/as3722.o (Before)
   text	   data	    bss	    dec	    hex	filename
   9441	    680	     16	  10137	   2799	drivers/mfd/as3722.o

$ size drivers/mfd/as3722.o (After)
   text	   data	    bss	    dec	    hex	filename
   9345	    680	     16	  10041	   2739	drivers/mfd/as3722.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/bb631974888dfe1af593b6280cf30fb913d2d1a4.1676365116.git.christophe.jaillet@wanadoo.fr
This commit is contained in:
Christophe JAILLET 2023-02-14 09:58:59 +01:00 committed by Lee Jones
parent b09ed62f2d
commit 86c6bb0edf
1 changed files with 4 additions and 4 deletions
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8
include/linux/mfd/core.h
View file

@ -78,6 +78,9 @@ struct mfd_cell {
void *platform_data;
size_t pdata_size;
/* Matches ACPI */
const struct mfd_cell_acpi_match *acpi_match;
/* Software node for the device. */
const struct software_node *swnode;
@ -97,9 +100,6 @@ struct mfd_cell {
/* Set to 'true' to use 'of_reg' (above) - allows for of_reg=0 */
bool use_of_reg;
/* Matches ACPI */
const struct mfd_cell_acpi_match *acpi_match;
/*
* These resources can be specified relative to the parent device.
* For accessing hardware you should use resources from the platform dev
@ -119,8 +119,8 @@ struct mfd_cell {
/* A list of regulator supplies that should be mapped to the MFD
* device rather than the child device when requested
*/
const char * const *parent_supplies;
int num_parent_supplies;
const char * const *parent_supplies;
};
/*