Commit b6664ba4 authored by AKASHI Takahiro's avatar AKASHI Takahiro Committed by Will Deacon
Browse files

s390, kexec_file: drop arch_kexec_mem_walk() 



Since s390 already knows where to locate buffers, calling
arch_kexec_mem_walk() has no sense. So we can just drop it as kbuf->mem
indicates this while all other architectures sets it to 0 initially.

This change is a preparatory work for the next patch, where all the
variant memory walks, either on system resource or memblock, will be
put in one common place so that it will satisfy all the architectures'
need.

Signed-off-by: default avatarAKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: default avatarPhilipp Rudo <prudo@linux.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 92a98a2b

arch/s390/kernel/machine_kexec_file.c

+0 −10
Original line number Diff line number Diff line
@@ -134,16 +134,6 @@ int kexec_file_add_initrd(struct kimage *image, struct s390_load_data *data, 
	return ret;

}



/*

 * The kernel is loaded to a fixed location. Turn off kexec_locate_mem_hole

 * and provide kbuf->mem by hand.

 */

int arch_kexec_walk_mem(struct kexec_buf *kbuf,

			int (*func)(struct resource *, void *))

{

	return 1;

}



int arch_kexec_apply_relocations_add(struct purgatory_info *pi,

				     Elf_Shdr *section,

				     const Elf_Shdr *relsec,

include/linux/kexec.h

+8 −0
Original line number Diff line number Diff line
@@ -145,6 +145,14 @@ int kexec_image_probe_default(struct kimage *image, void *buf, 
			      unsigned long buf_len);

int kexec_image_post_load_cleanup_default(struct kimage *image);



/*

 * If kexec_buf.mem is set to this value, kexec_locate_mem_hole()

 * will try to allocate free memory. Arch may overwrite it.

 */

#ifndef KEXEC_BUF_MEM_UNKNOWN

#define KEXEC_BUF_MEM_UNKNOWN 0

#endif



/**

 * struct kexec_buf - parameters for finding a place for a buffer in memory

 * @image:	kexec image in which memory to search.

kernel/kexec_file.c

+4 −0
Original line number Diff line number Diff line
@@ -532,6 +532,10 @@ int kexec_locate_mem_hole(struct kexec_buf *kbuf) 
{

	int ret;



	/* Arch knows where to place */

	if (kbuf->mem != KEXEC_BUF_MEM_UNKNOWN)

		return 0;



	ret = arch_kexec_walk_mem(kbuf, locate_mem_hole_callback);



	return ret == 1 ? 0 : -EADDRNOTAVAIL;

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