diff options
| author | Tiwei Bie <[email protected]> | 2025-03-15 16:19:08 +0000 |
|---|---|---|
| committer | Johannes Berg <[email protected]> | 2025-03-20 08:28:44 +0000 |
| commit | 33c9da5dfb18c2ff5a88d01aca2cf253cd0ac3bc (patch) | |
| tree | 0ef75011ee477633de8c882d696314eca6fffefb /arch/um/drivers/random.c | |
| parent | um: Prohibit the VM_CLONE flag in run_helper_thread() (diff) | |
| download | kernel-33c9da5dfb18c2ff5a88d01aca2cf253cd0ac3bc.tar.gz kernel-33c9da5dfb18c2ff5a88d01aca2cf253cd0ac3bc.zip | |
um: Rewrite the sigio workaround based on epoll and tgkill
The existing sigio workaround implementation removes FDs from the
poll when events are triggered, requiring users to re-add them via
add_sigio_fd() after processing. This introduces a potential race
condition between FD removal in write_sigio_thread() and next_poll
update in __add_sigio_fd(), and is inefficient due to frequent FD
removal and re-addition. Rewrite the implementation based on epoll
and tgkill for improved efficiency and reliability.
Signed-off-by: Tiwei Bie <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Johannes Berg <[email protected]>
Diffstat (limited to 'arch/um/drivers/random.c')
| -rw-r--r-- | arch/um/drivers/random.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index da985e0dc69a..ca08c91f47a3 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -79,7 +79,7 @@ static int __init rng_init (void) if (err < 0) goto err_out_cleanup_hw; - sigio_broken(random_fd); + sigio_broken(); hwrng.name = RNG_MODULE_NAME; hwrng.read = rng_dev_read; |