diff options
| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2025-06-12 08:29:07 +0200 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2025-06-18 16:42:42 +0200 |
| commit | 5ea2bcdfbf46fc3aac239ea371a9561053cc977a (patch) | |
| tree | 32f48051c17bee9dca621ce2eb0dc6662a360389 /kernel/printk/printk_ringbuffer.c | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
printk: ringbuffer: Add KUnit test
The KUnit test validates the correct operation of the ringbuffer.
A separate dedicated ringbuffer is used so that the global printk
ringbuffer is not touched.
Co-developed-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20250612-printk-ringbuffer-test-v3-1-550c088ee368@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'kernel/printk/printk_ringbuffer.c')
| -rw-r--r-- | kernel/printk/printk_ringbuffer.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/printk/printk_ringbuffer.c b/kernel/printk/printk_ringbuffer.c index d9fb053cff67..bc811de18316 100644 --- a/kernel/printk/printk_ringbuffer.c +++ b/kernel/printk/printk_ringbuffer.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 +#include <kunit/visibility.h> #include <linux/kernel.h> #include <linux/irqflags.h> #include <linux/string.h> @@ -1685,6 +1686,7 @@ fail: memset(r, 0, sizeof(*r)); return false; } +EXPORT_SYMBOL_IF_KUNIT(prb_reserve); /* Commit the data (possibly finalizing it) and restore interrupts. */ static void _prb_commit(struct prb_reserved_entry *e, unsigned long state_val) @@ -1759,6 +1761,7 @@ void prb_commit(struct prb_reserved_entry *e) if (head_id != e->id) desc_make_final(e->rb, e->id); } +EXPORT_SYMBOL_IF_KUNIT(prb_commit); /** * prb_final_commit() - Commit and finalize (previously reserved) data to @@ -2184,6 +2187,7 @@ bool prb_read_valid(struct printk_ringbuffer *rb, u64 seq, { return _prb_read_valid(rb, &seq, r, NULL); } +EXPORT_SYMBOL_IF_KUNIT(prb_read_valid); /** * prb_read_valid_info() - Non-blocking read of meta data for a requested @@ -2333,6 +2337,7 @@ void prb_init(struct printk_ringbuffer *rb, infos[0].seq = -(u64)_DESCS_COUNT(descbits); infos[_DESCS_COUNT(descbits) - 1].seq = 0; } +EXPORT_SYMBOL_IF_KUNIT(prb_init); /** * prb_record_text_space() - Query the full actual used ringbuffer space for |