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| author | Denys Vlasenko | 2021-03-20 14:01:04 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2021-03-20 14:01:04 +0100 |
| commit | 14ed4ec8a416a60a214bf40f9185aa227ac44598 (patch) | |
| tree | ae440de8397ccb9e26d444e24ff5c283cd12d55e /klibc-utils | |
| parent | 2a2ca935309bfacbc7f87de752f869a89748052c (diff) | |
| download | busybox-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.c | 9 |
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 */ |