NAME<\/a> save_flags, restore_flags \u2212 save\/restore processor state and irq mask<\/p>\n #include unsigned long<\/b> flags<\/i>; The save_flags<\/b> and restore_flags<\/b> macros cooperate with the cli<\/b> function to provide interrupt protection to critical sections of code. The save_flags<\/b> function saves the current processor state, most specifically the interrupt priority level, in the flags<\/i> value (which must be an l-value). The flags must be passed to a subsequent call to restore_flags<\/b> to restore the processor state.<\/p>\n The save_flags<\/b> macro does not affect the processor state, but drivers may use the cli<\/b>(9) and sti<\/b> functions to disable and enable interrupts after saving the current flags. When the critical section of code is passed, the restore_flags<\/b> returns the processor to its state at the point where the matching save_flags<\/b> was called.<\/p>\n Only values returned by save_flags<\/b> can be passed to restore_flags.<\/b> Any other values may cause unpredictable results, and are certainly not portable.<\/p>\n The restore_flags<\/b> macro saves the processor state in the flags<\/i> parameter, which must be a non-const l-value.<\/p>\n Linux 1.0+<\/p>\n cli<\/b>(9)<\/p>\n Stephen Williams (steve@icarus.com)<\/p>\n How does all this react with symmetric multiprocessor machines?<\/p>\n save_flags, restore_flags \u2212 save\/restore processor state and irq mask <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1222],"tags":[1226,1223,1225,1250],"class_list":["post-4170","post","type-post","status-publish","format-standard","hentry","category-9-rutinas-del-nucleo","tag-1226","tag-kernel","tag-man9","tag-save_flags"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/4170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=4170"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/4170\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=4170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=4170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=4170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
AVAILABILITY<\/a>
SEE ALSO<\/a>
AUTHOR<\/a>
BUGS<\/a> <\/p>\n
\nNAME <\/a> <\/h2>\n
SYNOPSIS <\/a> <\/h2>\n
void save_flags(<\/b>flags<\/i>)
void restore_flags(<\/b>flags<\/i>)<\/b><\/p>\nDESCRIPTION <\/a> <\/h2>\n
RETURN VALUE <\/a> <\/h2>\n
AVAILABILITY <\/a> <\/h2>\n
SEE ALSO <\/a> <\/h2>\n
AUTHOR <\/a> <\/h2>\n
BUGS <\/a> <\/h2>\n
\n","protected":false},"excerpt":{"rendered":"