diff options
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Kconfig.debug | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 0d8a5a4a789d..0d385be682db 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug | |||
@@ -81,7 +81,7 @@ config HEADERS_CHECK | |||
81 | 81 | ||
82 | config DEBUG_SECTION_MISMATCH | 82 | config DEBUG_SECTION_MISMATCH |
83 | bool "Enable full Section mismatch analysis" | 83 | bool "Enable full Section mismatch analysis" |
84 | default n | 84 | depends on UNDEFINED |
85 | help | 85 | help |
86 | The section mismatch analysis checks if there are illegal | 86 | The section mismatch analysis checks if there are illegal |
87 | references from one section to another section. | 87 | references from one section to another section. |
@@ -90,19 +90,19 @@ config DEBUG_SECTION_MISMATCH | |||
90 | most likely result in an oops. | 90 | most likely result in an oops. |
91 | In the code functions and variables are annotated with | 91 | In the code functions and variables are annotated with |
92 | __init, __devinit etc. (see full list in include/linux/init.h) | 92 | __init, __devinit etc. (see full list in include/linux/init.h) |
93 | which result in the code/data being placed in specific sections. | 93 | which results in the code/data being placed in specific sections. |
94 | The section mismatch anaylsis are always done after a full | 94 | The section mismatch analysis is always done after a full |
95 | kernel build but enabling this options will in addition | 95 | kernel build but enabling this option will in addition |
96 | do the following: | 96 | do the following: |
97 | - Add the option -fno-inline-functions-called-once to gcc | 97 | - Add the option -fno-inline-functions-called-once to gcc |
98 | When inlining a function annotated __init in a non-init | 98 | When inlining a function annotated __init in a non-init |
99 | function we would loose the section information and thus | 99 | function we would lose the section information and thus |
100 | the analysis would not catch the illegal reference. | 100 | the analysis would not catch the illegal reference. |
101 | This options tell gcc to inline less but will also | 101 | This option tells gcc to inline less but will also |
102 | result in a larger kernel. | 102 | result in a larger kernel. |
103 | - Run the section mismatch analysis for each module/built-in.o | 103 | - Run the section mismatch analysis for each module/built-in.o |
104 | When we run the section mismatch analysis on vmlinux.o we | 104 | When we run the section mismatch analysis on vmlinux.o we |
105 | looses valueable information about where the mismatch was | 105 | lose valueble information about where the mismatch was |
106 | introduced. | 106 | introduced. |
107 | Running the analysis for each module/built-in.o file | 107 | Running the analysis for each module/built-in.o file |
108 | will tell where the mismatch happens much closer to the | 108 | will tell where the mismatch happens much closer to the |