xavi/android_kernel_m2note/lib, branch ng-7.1.2

lib/div64.c: off by one in shift

2019-05-03T16:50:55+00:00

[ Upstream commit cdc94a37493135e355dfc0b0e086d84e3eadb50d ] fls counts bits starting from 1 to 32 (returns 0 for zero argument). If we add 1 we shift right one bit more and loose precision from divisor, what cause function incorect results with some numbers. Corrected code was tested in user-space, see bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202391 Link: http://lkml.kernel.org/r/1548686944-11891-1-git-send-email-sgruszka@redhat.com Fixes: 658716d19f8f ("div64_u64(): improve precision on 32bit platforms") Signed-off-by: Stanislaw Gruszka Reported-by: Siarhei Volkau Tested-by: Siarhei Volkau Acked-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin

ANDROID: lib: vsprintf: additional kernel pointer filtering options

2019-05-03T16:09:53+00:00

Add the kptr_restrict setting of 3 which results in both %p and %pK values being replaced by zeros. Add an additional %pP value inspired by the Grsecurity option which explicitly whitelists pointers for output. This patch is based on work by William Roberts [CV: fixed GCC warning on 32 bit targets] BUG: 30368199 Change-Id: Ic5cef86617f7758514271edd67199683d2c4e2bb Signed-off-by: Dave Weinstein

lib/string.c: remove duplicated function

2019-05-03T16:01:29+00:00

commit cd514e727b18ff4d189b8e268db13729a4175091 upstream. lib/string.c contains two functions, strnicmp and strncasecmp, which do roughly the same thing, namely compare two strings case-insensitively up to a given bound. They have slightly different implementations, but the only important difference is that strncasecmp doesn't handle len==0 appropriately; it effectively becomes strcasecmp in that case. strnicmp correctly says that two strings are always equal in their first 0 characters. strncasecmp is the POSIX name for this functionality. So rename the non-broken function to the standard name. To minimize the impact on the rest of the kernel (and since both are exported to modules), make strnicmp a wrapper for strncasecmp. Change-Id: I2fdf47e3b49d1ddae568afa6bea8be8141edffd3 Signed-off-by: Rasmus Villemoes Cc: Grant Likely Cc: Andi Kleen Cc: Dan Carpenter Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Ben Hutchings

lib/is_single_threaded.c: change current_is_single_threaded() to use for_each_thread()

2019-05-02T16:14:30+00:00

Change current_is_single_threaded() to use for_each_thread() rather than deprecated while_each_thread(). Change-Id: Ie0abc34982554e4ec5e0d2a8457c9bbd386c814d Signed-off-by: Oleg Nesterov Cc: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Revert "GCC: Fix up for gcc 5+"

2018-11-29T23:02:49+00:00

This reverts commit ff505baaf412985af758d5820cd620ed9f1a7e05.

Replace with globally

2018-11-29T16:49:05+00:00

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds Signed-off-by: Moyster

net: core: move mac_pton() to lib/net_utils.c

2018-11-29T15:06:34+00:00

Since we have at least one user of this function outside of CONFIG_NET scope, we have to provide this function independently. The proposed solution is to move it under lib/net_utils.c with corresponding configuration variable and select wherever it is needed. Signed-off-by: Andy Shevchenko Reported-by: Arnd Bergmann Acked-by: David S. Miller Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman

lib/string.c: use the name "C-string" in comments

2018-11-29T15:03:41+00:00

For strncpy() and friends the source string may or may not have an actual NUL character at the end. The documentation is confusing in this because it specifically mentions that you are passing a "NUL-terminated" string. Wikipedia says that "C-string" is an alternative name we can use instead. http://en.wikipedia.org/wiki/Null-terminated_string Signed-off-by: Dan Carpenter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

asmlinkage Make __stack_chk_failed and memcmp visible

2018-11-29T15:02:36+00:00

In LTO symbols implicitely referenced by the compiler need to be visible. Earlier these symbols were visible implicitely from being exported, but we disabled implicit visibility fo EXPORTs when modules are disabled to improve code size. So now these symbols have to be marked visible explicitely. Do this for __stack_chk_fail (with stack protector) and memcmp. Signed-off-by: Andi Kleen Link: http://lkml.kernel.org/r/1391845930-28580-10-git-send-email-ak@linux.intel.com Signed-off-by: H. Peter Anvin

genalloc: Correct nbytes calculation on long boundary

2018-11-29T14:21:43+00:00

In existing code we calculate nbytes based on the byte boundary, but genalloc uses bitmap for maintaining the memory allocation aligned to long. So while calculating nbytes we end up getting wrong nbytes. example: lets say nbytes comes to 9 bytes for 70 bits when bytes aligned,but if long aligned we will have 3 long words i.e 12 bytes. This difference may lead to choosing the wrong api for freeing the memory i.e Between kfree() and vfree(). Fix was inspired by an upstream commit eedce141cd2dad8d0cefc5468ef41898949a7031, bringing same fix into the gen_pool_detroy path. Change-Id: I942caf59e25515c780896b328b912604df9e10bf Signed-off-by: Hareesh Gundu Signed-off-by: Sunil Khatri