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um: remove file sync for stub data

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There is no need to sync the stub code to "disk" for the other process
to see the correct memory. Drop the fsync there and remove the helper
function.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20241103150506.1367695-3-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg 2024-11-03 16:05:04 +01:00 committed by Johannes Berg
parent 2f278b5957
commit 37c691151e
3 changed files with 0 additions and 8 deletions
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1
arch/um/include/shared/os.h
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@ -145,7 +145,6 @@ extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
extern int os_get_ifname(int fd, char *namebuf);
extern int os_set_slip(int fd);
extern int os_mode_fd(int fd, int mode);
extern int os_fsync_file(int fd);
extern int os_seek_file(int fd, unsigned long long offset);
extern int os_open_file(const char *file, struct openflags flags, int mode);

1
arch/um/kernel/physmem.c
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@ -101,7 +101,6 @@ void __init setup_physmem(unsigned long start, unsigned long reserve_end,
*/
os_seek_file(physmem_fd, __pa(__syscall_stub_start));
os_write_file(physmem_fd, __syscall_stub_start, PAGE_SIZE);
os_fsync_file(physmem_fd);
memblock_add(__pa(start), len);
memblock_reserve(__pa(start), reserve);

6
arch/um/os-Linux/file.c
View File

@ -255,12 +255,6 @@ void os_close_file(int fd)
{
close(fd);
}
int os_fsync_file(int fd)
{
if (fsync(fd) < 0)
return -errno;
return 0;
}
int os_seek_file(int fd, unsigned long long offset)
{