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authorDenys Vlasenko2021-03-20 14:01:04 +0100
committerDenys Vlasenko2021-03-20 14:01:04 +0100
commit14ed4ec8a416a60a214bf40f9185aa227ac44598 (patch)
treeae440de8397ccb9e26d444e24ff5c283cd12d55e /klibc-utils
parent2a2ca935309bfacbc7f87de752f869a89748052c (diff)
downloadbusybox-14ed4ec8a416a60a214bf40f9185aa227ac44598.zip
busybox-14ed4ec8a416a60a214bf40f9185aa227ac44598.tar.gz
resume: write offset in /sys/power/resume_offset
Doing this the kernel will hibernate and resume successfully from a swap file. Stop writing offset to /sys/power/resume, as this is not a parameter the kernel takes from this input. (Change added by Sven Mueller) function old new delta resume_main 522 561 +39 .rodata 103175 103182 +7 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 46/0) Total: 46 bytes Signed-off-by: Jordi Pujol Palomer <jordipujolp@gmail.com> Signed-off-by: Sven Mueller <sven.mueller72+busybox@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'klibc-utils')
-rw-r--r--klibc-utils/resume.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/klibc-utils/resume.c b/klibc-utils/resume.c
index 2bf50f9..8c4ab26 100644
--- a/klibc-utils/resume.c
+++ b/klibc-utils/resume.c
@@ -103,10 +103,17 @@ int resume_main(int argc UNUSED_PARAM, char **argv)
if (major(resume_device) == 0) {
bb_error_msg_and_die("invalid resume device: %s", argv[0]);
}
+
ofs = (argv[1] ? xstrtoull(argv[1], 0) : 0);
+ /* Old kernels have no /sys/power/resume_offset, set it only if necessary */
+ if (ofs != 0) {
+ fd = xopen("/sys/power/resume_offset", O_WRONLY);
+ s = xasprintf("%llu", ofs);
+ xwrite_str(fd, s);
+ }
fd = xopen("/sys/power/resume", O_WRONLY);
- s = xasprintf("%u:%u:%llu", major(resume_device), minor(resume_device), ofs);
+ s = xasprintf("%u:%u", major(resume_device), minor(resume_device));
xwrite_str(fd, s);
/* if write() returns, resume did not succeed */