duff/android_kernel_motorola_sm6225
1
0 Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Makefile: Disable constant merging/optimziations with clang

Browse Source 
Clang optimizes static constant variables if both variables are
having same value. clang decided to merge the bpf_prog_iops and
bpf_map_iops into a single memory location, such that the two
i_ops could then not be distinguished anymore and leading to
kernel panic. So disable Snapdragon specific compiler optimizations
by adding -mllvm -disable-struct-const-merge flag to CFLAG.

Change-Id: I3a8d3829fd5102c916e74af4080a1b1d2d3257b9
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
This commit is contained in:
Prasad Sodagudi authored and Gerrit - the friendly Code Review server committed 2018-08-03 10:23:00 -07:00
1 parent 13a07ada0e
commit f7c63176ab
1 file changed
+1
Download Patch File Download Diff File Expand all files Collapse all files
Makefile
+1
View File
@@ -713,6 +713,7 @@ KBUILD_CFLAGS += -Wno-initializer-overrides
KBUILD_CFLAGS += -fno-builtin
KBUILD_CFLAGS += $(call cc-option, -Wno-undefined-optimized)
KBUILD_CFLAGS += $(call cc-option, -Wno-tautological-constant-out-of-range-compare)
KBUILD_CFLAGS += $(call cc-option, -mllvm -disable-struct-const-merge)
# Quiet clang warning: comparison of unsigned expression < 0 is always false
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)