BMC/Intel-BMC/linux.git/drivers/char/hpet.c, branch dev-5.1

hpet: Use struct_size() in kzalloc()

2019-02-26T11:53:55+00:00

One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; struct boo entry[]; }; size = sizeof(struct foo) + count * sizeof(struct boo); instance = kzalloc(size, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL); Notice that, in this case, variable siz is not necessary, hence it is removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva Signed-off-by: Greg Kroah-Hartman

hpet: Fix missing '=' character in the __setup() code of hpet_mmap_enable

2019-01-22T12:34:35+00:00

Commit '3d035f580699 ("drivers/char/hpet.c: allow user controlled mmap for user processes")' introduced a new kernel command line parameter hpet_mmap, that is required to expose the memory map of the HPET registers to user-space. Unfortunately the kernel command line parameter 'hpet_mmap' is broken and never takes effect due to missing '=' character in the __setup() code of hpet_mmap_enable. Before this patch: dmesg output with the kernel command line parameter hpet_mmap=1 [ 0.204152] HPET mmap disabled dmesg output with the kernel command line parameter hpet_mmap=0 [ 0.204192] HPET mmap disabled After this patch: dmesg output with the kernel command line parameter hpet_mmap=1 [ 0.203945] HPET mmap enabled dmesg output with the kernel command line parameter hpet_mmap=0 [ 0.204652] HPET mmap disabled Fixes: 3d035f580699 ("drivers/char/hpet.c: allow user controlled mmap for user processes") Signed-off-by: Buland Singh Signed-off-by: Greg Kroah-Hartman

hpet: remove redundant pointer hpet

2018-07-03T11:01:57+00:00

Pointer hpet is being assigned but is never used hence it is redundant and can be removed. Cleans up clang warning: warning: variable 'hpet' set but not used [-Wunused-but-set-variable] Signed-off-by: Colin Ian King Signed-off-by: Greg Kroah-Hartman

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11T22:34:03+00:00

This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^$[^\"]*$$\$/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro Signed-off-by: Linus Torvalds

the rest of drivers/*: annotate ->poll() instances

2017-11-28T16:06:58+00:00

Signed-off-by: Al Viro

hpet: Make cmd parameter of hpet_ioctl_common() unsigned

2017-03-17T06:10:49+00:00

The value passed by the two callers of the function is unsigned anyway. Making the parameter unsigned fixes the following warning when building with clang: drivers/char/hpet.c:588:7: error: overflow converting case value to switch condition type (2149083139 to 18446744071563667459) [-Werror,-Wswitch] case HPET_INFO: ^ include/uapi/linux/hpet.h:18:19: note: expanded from macro 'HPET_INFO' ^ include/uapi/asm-generic/ioctl.h:77:28: note: expanded from macro '_IOR' ^ include/uapi/asm-generic/ioctl.h:66:2: note: expanded from macro '_IOC' (((dir) << _IOC_DIRSHIFT) | \ Signed-off-by: Matthias Kaehlcke Acked-by: Clemens Ladisch Signed-off-by: Greg Kroah-Hartman

sched/headers: Prepare to move signal wakeup & sigpending methods from into

2017-03-02T07:42:32+00:00

Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

clocksource: Use a plain u64 instead of cycle_t

2016-12-25T10:04:12+00:00

There is no point in having an extra type for extra confusion. u64 is unambiguous. Conversion was done with the following coccinelle script: @rem@ @@ -typedef u64 cycle_t; @fix@ typedef cycle_t; @@ -cycle_t +u64 Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz

hpet: Drop stale URLs

2016-02-17T08:39:56+00:00

Looks like the HPET spec at intel.com got moved. It isn't hard to find so drop the link, just mention the revision assumed. Suggested-by: Thomas Gleixner Signed-off-by: Michael S. Tsirkin Acked-by: Greg Kroah-Hartman Cc: Arnd Bergmann Cc: Clemens Ladisch Cc: Jonathan Corbet Cc: Linus Torvalds Cc: Peter Zijlstra Cc: linux-doc@vger.kernel.org Link: http://lkml.kernel.org/r/1455145462-3877-1-git-send-email-mst@redhat.com Signed-off-by: Ingo Molnar

drivers/char: make hpet.c explicitly non-modular

2015-09-21T02:32:35+00:00

The Kconfig currently controlling compilation of this code is: char/Kconfig:config HPET char/Kconfig: bool "HPET - High Precision Event Timer" if (X86 || IA64) ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We don't replace module.h with init.h since the file already has that. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. We leave some tags like MODULE_AUTHOR for documentation purposes. Cc: Arnd Bergmann Cc: Clemens Ladisch Signed-off-by: Paul Gortmaker Signed-off-by: Greg Kroah-Hartman