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| author | Danilo Krummrich <dakr@kernel.org> | 2026-08-13 18:52:04 +0200 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-08-17 01:41:36 +0200 |
| commit | f146c7bc85a51f95c05e0f8173d484eb301ece78 (patch) | |
| tree | 07296ae54ed6551492b0c609dc0f5463f61f89ca /fs/proc/uptime.c | |
| download | linux-stable-f146c7bc85a51f95c05e0f8173d484eb301ece78.tar.gz linux-stable-f146c7bc85a51f95c05e0f8173d484eb301ece78.zip | |
PCI: Add pci_irq_type() to query the allocated interrupt typegrafted
Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX
based on the interrupt type the PCI core selected after
pci_alloc_irq_vectors().
Several drivers already open-code this check against pdev->msix_enabled
and pdev->msi_enabled, or even open code this helper [1].
A common helper avoids the duplication and keeps drivers from accessing
the bitfield directly (see also [2]).
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: John Hubbard <jhubbard@nvidia.com>
Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1]
Inspired-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2]
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org
[ Add missing pci_irq_type() stub for CONFIG_PCI=n. ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'fs/proc/uptime.c')
| -rw-r--r-- | fs/proc/uptime.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/fs/proc/uptime.c b/fs/proc/uptime.c new file mode 100644 index 000000000..433aa947c --- /dev/null +++ b/fs/proc/uptime.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/proc_fs.h> +#include <linux/sched.h> +#include <linux/seq_file.h> +#include <linux/time.h> +#include <linux/time_namespace.h> +#include <linux/kernel_stat.h> +#include "internal.h" + +static int uptime_proc_show(struct seq_file *m, void *v) +{ + struct timespec64 uptime; + struct timespec64 idle; + u64 idle_nsec; + u32 rem; + int i; + + idle_nsec = 0; + for_each_possible_cpu(i) + idle_nsec += kcpustat_field(CPUTIME_IDLE, i); + + ktime_get_boottime_ts64(&uptime); + timens_add_boottime(&uptime); + + idle.tv_sec = div_u64_rem(idle_nsec, NSEC_PER_SEC, &rem); + idle.tv_nsec = rem; + seq_printf(m, "%lu.%02lu %lu.%02lu\n", + (unsigned long) uptime.tv_sec, + (uptime.tv_nsec / (NSEC_PER_SEC / 100)), + (unsigned long) idle.tv_sec, + (idle.tv_nsec / (NSEC_PER_SEC / 100))); + return 0; +} + +static int __init proc_uptime_init(void) +{ + struct proc_dir_entry *pde; + + pde = proc_create_single("uptime", 0, NULL, uptime_proc_show); + pde_make_permanent(pde); + return 0; +} +fs_initcall(proc_uptime_init); |