diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-26 10:38:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-26 10:38:21 +0200 |
| commit | 67102bd31b4e31abb0abbc390381212a2d65db72 (patch) | |
| tree | 904754c940eb87b951cf877f09074a7d28bc2947 /include/linux/buffer_head.h | |
| parent | ad5dbfc123e6ffbbde194e2a4603323e09f741ee (diff) | |
| parent | f76349cf41451c5c42a99f18a9163377e4b364ff (diff) | |
Merge 6.0-rc7 into usb-next
We need the USB fixes in here for other follow-on changes to be able to
be applied successfully.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/buffer_head.h')
| -rw-r--r-- | include/linux/buffer_head.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 089c9ade4325..df518c429667 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -138,6 +138,17 @@ BUFFER_FNS(Defer_Completion, defer_completion) static __always_inline void set_buffer_uptodate(struct buffer_head *bh) { /* + * If somebody else already set this uptodate, they will + * have done the memory barrier, and a reader will thus + * see *some* valid buffer state. + * + * Any other serialization (with IO errors or whatever that + * might clear the bit) has to come from other state (eg BH_Lock). + */ + if (test_bit(BH_Uptodate, &bh->b_state)) + return; + + /* * make it consistent with folio_mark_uptodate * pairs with smp_load_acquire in buffer_uptodate */ |