opnsense-src/sys
Josef 'Jeff' Sipek 788987e034 acpi_battery: avoid divide-by-zero when no devices have capacity info
On laptops with builtin batteries, disconnecting the battery may show up
as a battery without any capacity information. (The theory is that one
is disconnecting the cells but the electronics identifying the battery
are still connected.) As a result, the loop over all batteries in
acpi_battery_get_battinfo results in total_lfcap == 0.

So, just check that total_lfcap is non-zero to avoid a division by zero
(triggerable by sysctl hw.acpi.battery).

Reported by:	Stefano Marinelli
Tested by:	Stefano Marinelli
Reviewed by:	emaste
Differential Revision: https://reviews.freebsd.org/D44818

(cherry picked from commit 2e850b832f5d2adb9b230d191277d67c00caaab9)
2024-04-19 03:16:52 +00:00
..
amd64 Stop using expressions in _Alignof() 2024-04-08 10:26:16 -07:00
arm busdma: fix page miscount for small segment sizes 2024-04-18 15:09:02 -03:00
arm64 busdma: fix page miscount for small segment sizes 2024-04-18 15:09:02 -03:00
bsm timerfd: Move implementation from linux compat to sys/kern 2023-08-24 14:28:56 -06:00
cam cam: Check if cam_simq_alloc fails for the xpt bus during module init 2024-04-08 10:53:43 -07:00
cddl Abstract UIO allocation and deallocation. 2024-03-08 23:27:20 -05:00
compat linuxkpi: Annotate an unused variable as such 2024-04-15 11:00:35 -07:00
conf 14.1: update stable/14 to -PRERELEASE 2024-04-18 19:49:36 -07:00
contrib ath_hal/ar9300: allow JUPITER cards to read eeprom 2024-04-01 23:46:10 +00:00
crypto ossl: Remove a stray __FBSDID("$FreeBSD$") 2024-03-29 09:53:05 -04:00
ddb ddb: Add sysctl flag CTLFLAG_TUN to loader tunable 2023-10-12 12:08:18 +08:00
dev acpi_battery: avoid divide-by-zero when no devices have capacity info 2024-04-19 03:16:52 +00:00
dts add allwinner overlays for enabling additional USB ports 2024-02-17 16:15:10 +02:00
fs nfscl: Purge name cache when readdir_plus is done 2024-04-17 17:49:10 -07:00
gdb sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
geom graid: MFC: unbreak Promise RAID1 with 4+ providers 2024-02-16 12:18:43 +07:00
gnu sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
i386 x86: handle MXCSR from XSAVEOPT when x87 state was optimized 2024-04-02 11:58:20 +03:00
isa isa: Postpone removal of the non-PNP driver until 15 2023-10-30 08:55:08 +08:00
kern uipc_socket: handle socket buffer locks in sopeeloff 2024-04-17 15:58:22 +02:00
kgssapi nfscl/kgssapi: Fix Kerberized NFS mounts to pNFS servers 2023-12-23 17:03:58 -08:00
libkern arm64: Mark the armv8 crc32c as supporting BTI 2024-02-19 13:17:47 +00:00
modules sound: Get rid of snd_clone and use DEVFS_CDEVPRIV(9) 2024-04-18 14:39:26 +02:00
net fib_algo(4): Lower level of algorithm switching messages to LOG_INFO 2024-04-18 21:30:33 +02:00
net80211 net80211: Fix two typos in kernel messages 2024-02-24 09:23:47 +01:00
netgraph ng_socket: Treat EEXIST from kern_kldload() as success 2024-04-16 12:34:56 +08:00
netinet tcp: Make tcp_var.h more self-contained 2024-04-17 10:33:27 -04:00
netinet6 carp: check CARP status in in_localip_fib(), in6_localip_fib() 2024-03-28 12:35:45 -07:00
netipsec ipsec esp: avoid dereferencing freed secasindex 2024-03-04 02:27:17 +02:00
netlink netlink: Don't use a zero-length array 2024-04-08 10:58:16 -07:00
netpfil ipfw: Skip to the start of the loop when following a keep-state rule 2024-04-08 10:57:53 -07:00
netsmb sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
nfs sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
nfsclient sys: Remove $FreeBSD$: one-line .h pattern 2023-08-16 11:54:18 -06:00
nfsserver sys: Remove $FreeBSD$: one-line .h pattern 2023-08-16 11:54:18 -06:00
nlm sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
ofed ibcore: Introduce enum ib_raw_packet_caps from Linux 4.11 2023-11-04 15:22:18 -04:00
opencrypto sys: Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:54:58 -06:00
powerpc busdma: fix page miscount for small segment sizes 2024-04-18 15:09:02 -03:00
riscv busdma: fix page miscount for small segment sizes 2024-04-18 15:09:02 -03:00
rpc NFS: Request use of TCP_USE_DDP for in-kernel TCP sockets 2024-04-12 12:25:27 -07:00
security veriexec: Simplify the initialization of loader tunable 2023-11-13 11:56:57 +08:00
sys kassert.h: update MPASS definition commentary 2024-04-18 15:17:52 -03:00
teken teken: fix style in teken_wcwidth.h 2023-10-21 17:28:35 +03:00
tests netlink: move NETLINK define to opt_global.h 2023-10-16 09:42:33 +02:00
tools makesyscalls: don't make syscall.mk by default 2023-12-13 23:07:06 +00:00
ufs Eliminate unnecessary UFS1 integrity checks. 2024-03-04 16:09:10 -08:00
vm vm_reserv_reclaim_contig: Return NULL not false 2024-04-17 10:33:26 -04:00
x86 busdma: fix page miscount for small segment sizes 2024-04-18 15:09:02 -03:00
xdr sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
xen sys: Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:54:58 -06:00
Makefile sys: Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:54:58 -06:00
README.md sys/README.md: Add a section for documentation 2023-08-03 11:07:41 -03:00

FreeBSD Kernel Source:

This directory contains the source files and build glue that make up the FreeBSD kernel and its modules, including both original and contributed software.

Kernel configuration files are located in the conf/ subdirectory of each architecture. GENERIC is the configuration used in release builds. NOTES contains documentation of all possible entries. LINT is a compile-only configuration used to maximize build coverage and detect regressions.

Documentation:

Source code documentation is maintained in a set of man pages, under section 9. These pages are located in share/man/man9, from the top-level of the src tree. Consult intro(9) for an overview of existing pages.

Some additional high-level documentation of the kernel is maintained in the Architecture Handbook.

Source Roadmap:

Directory Description
amd64 AMD64 (64-bit x86) architecture support
arm 32-bit ARM architecture support
arm64 64-bit ARM (AArch64) architecture support
cam Common Access Method storage subsystem - cam(4) and ctl(4)
cddl CDDL-licensed optional sources such as DTrace
conf kernel build glue
compat Linux compatibility layer, FreeBSD 32-bit compatibility
contrib 3rd-party imported software such as OpenZFS
crypto crypto drivers
ddb interactive kernel debugger - ddb(4)
fs most filesystems, excluding UFS, NFS, and ZFS
dev device drivers and other arch independent code
gdb kernel remote GDB stub - gdb(4)
geom GEOM framework - geom(4)
i386 i386 (32-bit x86) architecture support
kern main part of the kernel
libkern libc-like and other support functions for kernel use
modules kernel module infrastructure
net core networking code
net80211 wireless networking (IEEE 802.11) - net80211(4)
netgraph graph-based networking subsystem - netgraph(4)
netinet IPv4 protocol implementation - inet(4)
netinet6 IPv6 protocol implementation - inet6(4)
netipsec IPsec protocol implementation - ipsec(4)
netpfil packet filters - ipfw(4), pf(4), and ipfilter(4)
opencrypto OpenCrypto framework - crypto(7)
powerpc PowerPC/POWER (32 and 64-bit) architecture support
riscv 64-bit RISC-V architecture support
security security facilities - audit(4) and mac(4)
sys kernel headers
tests kernel unit tests
ufs Unix File System - ffs(7)
vm virtual memory system
x86 code shared by AMD64 and i386 architectures